- ChimeraX-users - RBVI Mailing Lists

The House Always Wins
by johncarry9t＠gmail.com 06 Nov '25

06 Nov '25

The word "casino" conjures specific imagery: the clinking of chips, the hypnotic spin of the roulette wheel, the electric chorus of a slot machine jackpot. For centuries, these establishments have been temples of chance, promising glamour, excitement, and the life-changing possibility of a big win. But behind the flashing lights and free-flowing cocktails lies a meticulously engineered ecosystem designed for one ultimate goal: profitability. The modern casino is a fascinating blend of psychology, architecture, technology, and entertainment, far removed from the smoky, simplistic gambling halls of the past. https://hamiltongardens.org/visit/ The Architecture of Addiction: Designed to Disorient From the moment you step inside, the casino environment is carefully crafted to keep you playing. There are no clocks or windows, creating a timeless bubble where the outside world ceases to exist. Labyrinthine floor plans encourage exploration and make it difficult to find the exit. The air is oxygenated to keep patrons alert, and the constant sensory stimulation—from the ringing of slots to the vibrant carpet patterns—creates an atmosphere of thrilling chaos. This design is no accident. It's a calculated strategy to maximize "time on device." The longer a guest stays, the more the mathematical advantage of the games, known as the "house edge," grinds down their bankroll. Every element, from the placement of popular slots to the complimentary "comps" like drinks and hotel rooms, is a tool to enhance customer retention. The Games: A Calculated Dance of Chance At its core, a casino's business model is a masterpiece of applied mathematics. Every game offered is statistically tilted in the house's favor. Slot Machines: The undisputed king of the casino floor, slots are now sophisticated computers. Their outcomes are determined by Random Number Generators (RNGs), and their payout percentage, or "Return to Player" (RTP), is programmed in advance. Their appeal lies in their simplicity and the potential for massive, albeit infrequent, jackpots. Table Games: Games like Blackjack, Roulette, and Baccarat offer more player agency, but the house edge is immutable. In Blackjack, the dealer plays by fixed rules that disadvantage the player over time. In Roulette, the presence of the "0" and "00" on the American wheel gives the house its built-in advantage. Craps and Baccarat operate on similar statistical principles. Despite the odds, these games thrive because they offer the illusion of control and the social spectacle of a live game, presided over by a skilled dealer. Beyond the Floor: The Rise of the Integrated Resort The 21st-century casino is rarely just a casino. The model of the "Integrated Resort" has transformed these venues into full-scale entertainment destinations. Today's major casinos are home to: World-class hotels and spas Celebrity-chef restaurants High-end retail shopping Arena-sized theaters hosting A-list performers Convention and meeting spaces This diversification is a strategic move. By attracting conventioneers, gourmands, and concert-goers who may not be primary gamblers, resorts ensure a steady revenue stream that isn't solely dependent on the volatility of the gaming floor. It normalizes the casino, repositioning it as a legitimate vacation spot for a broader demographic. The Digital Frontier: Online Casinos and the Future The most significant shift in recent years has been the explosive growth of online casinos and mobile sports betting. The digital realm removes all physical barriers, allowing people to gamble from their living rooms or on their phones. This presents both immense opportunity and significant challenges. Online platforms use sophisticated algorithms and bonus structures to engage players, often with even higher efficiency than their brick-and-mortar counterparts. This accessibility has intensified the focus on responsible gambling. Regulators and ethical operators are now implementing tools like deposit limits, "cool-off" periods, and self-exclusion programs to help mitigate the risks of addiction that are amplified in the always-available online environment. The Final Bet The modern casino is a complex entity. It is a source of employment, tourism revenue, and entertainment for millions. It is also a highly engineered environment that profits from human psychology and mathematical certainty. As the industry continues to evolve with technology and expand into new markets, the balance between entertainment, profit, and social responsibility remains its defining tension. The house may always win in the end, but understanding the intricate machinery behind the magic curtain is the most valuable bet a visitor can make.

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F8BET Payment Methods
by johncarry9t＠gmail.com 06 Nov '25

06 Nov '25

A seamless banking experience is F8BET essential for any online casino player. F8BET provides a variety of safe, fast, and convenient payment methods, ensuring that deposits and withdrawals are hassle-free. Whether you prefer credit cards, e-wallets, or cryptocurrencies, F8BET guarantees secure transactions so you can focus on gaming. https://f8betlv.com/ Why Payment Methods Matter Efficient payment options enhance your online casino experience by: Saving Time: Quick deposits and withdrawals mean more gameplay. Providing Security: Advanced encryption protects your financial information. Offering Flexibility: Multiple options cater to different player preferences. Enabling Bonuses: Many payment methods qualify for deposit promotions. Deposit Options at F8BET F8BET offers multiple deposit methods for player convenience: 1. Credit and Debit Cards Visa, MasterCard, and Maestro are widely accepted. Instant deposits with secure processing. Tip: Ensure your card is enabled for online transactions. 2. E-Wallets Options include Skrill, Neteller, and ecoPayz. Quick deposits with added privacy. Tip: Some e-wallets offer cashback or promotions when depositing. 3. Bank Transfers Direct transfers from your bank account. Reliable and secure, though processing may take longer than e-wallets. 4. Cryptocurrencies Bitcoin, Ethereum, and other popular cryptocurrencies are accepted. Fast and secure with added anonymity. Tip: Check current exchange rates to maximize your deposit value. Withdrawal Methods F8BET ensures smooth and Đăng ký F8BET timely withdrawals: https://f8betlv.com/ E-Wallets: Typically processed within 24 hours. Bank Transfers: May take 2-5 business days depending on your bank. Credit/Debit Cards: Usually processed within 1-3 business days. Cryptocurrency: Withdrawals are fast, often completed within a few hours. Security Measures F8BET prioritizes player safety: SSL Encryption: Protects all financial and personal data. Verified Transactions: Each deposit and withdrawal is monitored for security. Trusted Payment Partners: F8BET works with reputable financial providers. Tips for Smooth Transactions Verify Your Account: Complete KYC (Know Your Customer) to avoid delays. Check Minimums and Maximums: Each payment method has specific limits. Use the Same Method for Deposit and Withdrawal: Ensures faster processing. Monitor Your Bank Statements: Keep track of transactions to avoid errors. Contact Support if Needed: F8BET customer service is available 24/7 for banking issues. Mobile Banking Convenience F8BET’s mobile platform supports all deposit and withdrawal methods. Manage your funds directly from your smartphone or tablet. Mobile banking maintains the same security and speed as desktop transactions. Conclusion Safe and fast banking is a key part of an enjoyable online casino experience, and F8BET excels in this area. With multiple deposit and withdrawal options, advanced security measures, and efficient processing, players can focus on slots, table games, and live casino action without worrying about payments. By following simple tips like account verification, tracking transactions, and using consistent payment methods, you can enjoy a smooth banking experience every time. Deposit, play, and withdraw with confidence at F8BET—your secure online casino destination!

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confirm
by 汪洋 05 Nov '25

05 Nov '25

 confirm c28d09cf0893ee23fc780e120106b9b266ea0623

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ChimeraX VR (specifically LookSee)
by jrj.healey＠gmail.com 02 Nov '25

02 Nov '25

Hi all, I'm trying to get ChimeraX VR standalone working on a Quest 3. Trying to follow the instruction online, but I fall at pretty much the first hurdle trying to subscribe to the release candidate channel on Meta AppLab - I get an error saying the channel is out of date or can no longer be found (or something to that effect). Do you have any more information on this, and does this mean side-loading is my only option potentially? Thanks Joe

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What is the University of Michigan manufacturing partnership with LS Manufacturing?
by altabunny9_at_gmail.com＠mail.d2l.msu.edu 01 Nov '25

01 Nov '25

In today’s rapidly evolving industrial landscape, the manufacturing sector stands at the intersection of innovation and technology. From 3D printing (additive manufacturing) to CNC machining (subtractive manufacturing), modern engineers are required to bridge the gap between theory and real-world application. Recognizing this growing need, the University of Michigan’s College of Engineering has established a ground-breaking partnership with LS Manufacturing, a leading global on-demand manufacturing company. This collaboration—centred around the University of Michigan manufacturing partnership initiative—aims to provide students with hands-on experience in additive and subtractive manufacturing education, bridging academic theory with real-world industrial practices. Together, they are shaping the next generation of manufacturing engineers, innovators, and entrepreneurs. <ol> <li>Introduction</li> </ol> Manufacturing today is not just about producing parts; it’s about producing ideas, efficiency, and sustainability. The rise of additive manufacturing technologies such as 3D printing, alongside traditional subtractive manufacturing methods like CNC machining, has transformed how engineers design, test, and create. Yet, one challenge remains constant in academia—how can students gain real-world manufacturing experience before entering the workforce? Hands-on education is crucial to understanding how concepts like material tolerances, design for manufacturability (DFM), and prototyping translate from theory into production. To address this, the University of Michigan Engineering Department, in partnership with LS Manufacturing, launched a forward-thinking initiative to blend classroom learning with industrial collaboration. This partnership emphasizes rapid prototyping for academic research, student project sponsorship in CNC machining, and opportunities for real-world manufacturing experience for students through capstone project sponsorships and innovation-focused technical grants. <ol start="2"> <li>The Partnership’s Vision & Goals</li> </ol> The University of Michigan manufacturing partnership with LS Manufacturing was born from a shared vision: to cultivate a new generation of engineers fluent in both the digital and physical realms of production. Goal 1: Enhance Student Learning At its core, the partnership focuses on improving how students learn and apply manufacturing principles. By providing access to industrial-grade manufacturing equipment, students can design, prototype, and refine projects using professional tools like high-precision CNC machines and advanced 3D printers. This approach transforms the University of Michigan’s classrooms and labs into dynamic, industry-connected learning environments. Students don’t just learn about manufacturing—they experience it firsthand. Goal 2: Bridge Theory and Practice Engineering theory provides the foundation for design, but practice makes it meaningful. Through this partnership, students engage directly with industry partners from University of Michigan Engineering and LS Manufacturing experts. They receive practical insights into design for manufacturability (DFM), rapid prototyping, and low-volume production—critical skills that align with modern industry expectations. For instance, when developing prototypes, students can leverage rapid prototyping for academic research, gaining experience in both additive and subtractive processes. This real-world engagement ensures they are not only technically proficient but also ready to innovate efficiently. Goal 3: Foster Innovation Innovation thrives at the intersection of creativity and capability. The University of Michigan partnership supports student-led initiatives such as the Solar Car Team, Robotics Club, and Formula SAE by providing manufacturing expertise, technical feedback, and production services. From concept sketches to final assembly, LS Manufacturing’s involvement helps these teams iterate faster and smarter. This collaboration empowers students to push the boundaries of engineering innovation while gaining the confidence to lead future industry breakthroughs. <ol start="3"> <li>How the Partnership Works: The “LS Manufacturing Technical Grant”</li> </ol> At the heart of this collaboration lies the LS Manufacturing Technical Grant, a unique sponsorship-in-kind program designed to empower student innovation. Through this grant, LS Manufacturing offers selected University of Michigan student projects and faculty research initiatives a combination of expert DFM feedback, rapid prototyping services, and production support using state-of-the-art CNC machining, 3D printing, and injection molding technologies. This model represents a corporate sponsorship in manufacturing that prioritizes educational value and accessibility. Rather than a traditional cash grant, it provides students with tangible, high-impact resources—professional-grade components, real-time consultation, and access to global production networks. Application Process The process is simple and inclusive. Student teams, faculty members, or research labs can apply through the University of Michigan Engineering Department’s partnership portal. Applicants outline their project goals, design needs, and desired manufacturing processes. Selected participants receive LS Manufacturing’s technical support to bring their designs to life. This initiative promotes student project sponsorship in CNC machining and similar technologies, encouraging students to prototype and test ideas efficiently. It’s a hands-on, learning-by-doing opportunity that merges academic ambition with industrial capability. <ol start="4"> <li>Expected Impact & Benefits for UM Students</li> </ol> The collaboration’s impact extends far beyond the classroom. It delivers a transformative learning experience by combining advanced technology, mentorship, and real-world exposure. Access to Global Manufacturing Networks Through LS Manufacturing’s online instant quoting platform, students gain access to a vast global manufacturing network. They can upload designs, receive cost estimates instantly, and understand how design choices affect pricing and feasibility. This mirrors real-world industry practices, preparing them for professional engineering roles where digital manufacturing tools are essential. Reduced Project Costs and Lead Times Student projects often face challenges such as limited funding and long turnaround times. LS Manufacturing helps address both issues by providing cost-effective production support and faster lead times. Whether it’s producing a prototype for a capstone project or components for research testing, students can move from concept to prototype at record speed. Skill Development and Industry Interaction Beyond technical proficiency, this partnership develops professional skills—teamwork, communication, and project management. Students interact directly with LS Manufacturing’s engineering experts, gaining feedback on design feasibility and manufacturing optimization. Such exposure provides a window into real-world manufacturing experience, helping them bridge the often-cited gap between academia and industry. Accelerated Research and Innovation For faculty and graduate researchers, access to LS Manufacturing’s rapid prototyping services means faster testing and iteration cycles. Projects that once took months to prototype can now progress in weeks, enabling researchers to focus more on innovation and less on logistical barriers. Ultimately, this partnership enhances not just student outcomes, but the entire research ecosystem at the University of Michigan. <ol start="5"> <li>About LS Manufacturing</li> </ol> LS Manufacturing is a global leader in on-demand manufacturing and rapid prototyping services, empowering innovators and engineers to move from prototype to production with speed and precision. Their core capabilities include CNC machining, 3D printing, injection molding, and sheet metal fabrication—making them a one-stop solution for any stage of the manufacturing process. Through collaborations with academic institutions, LS Manufacturing demonstrates its commitment to supporting education, innovation, and workforce development. By working with the University of Michigan, the company is investing in the future of engineering talent and helping shape the next generation of manufacturing leaders. To learn more about their services and mission, visit <a class="external" href="http://www.lsrpf.com" target="_blank" rel="noreferrer noopener">www.lsrpf.com</a>. <ol start="6"> <li>Conclusion & Looking Ahead</li> </ol> The partnership between the University of Michigan and LS Manufacturing exemplifies what’s possible when academia and industry work hand in hand. By merging additive and subtractive manufacturing education with real-world applications, the collaboration equips students with the tools, experience, and confidence to lead the future of manufacturing. Through the LS Manufacturing Technical Grant, University of Michigan students are not only designing innovative products but also learning how to manufacture them efficiently—a skill set that’s indispensable in the global economy. As this partnership continues to grow, it promises to inspire new research collaborations, support entrepreneurial initiatives, and redefine how engineering education meets the demands of modern manufacturing. The future of the industry depends on creative thinkers, hands-on problem solvers, and innovators—and this program ensures they’re ready to lead. <ol start="7"> <li>Call to Action (For the UM Audience)</li> </ol> Faculty and student teams interested in exploring manufacturing innovation or applying for the LS Manufacturing Technical Grant are encouraged to contact the University of Michigan College of Engineering Department of Mechanical Engineering or visit the UM Engineering Partnership Page for more information. This is more than a sponsorship—it’s a movement toward redefining how students learn, design, and build. Together, the University of Michigan and LS Manufacturing are crafting the future of engineering education—one prototype at a time. FAQs <ol> <li>What is the University of Michigan manufacturing partnership with LS Manufacturing?</li> </ol> The University of Michigan manufacturing partnership with LS Manufacturing is a collaborative program designed to give students hands-on experience in modern manufacturing technologies. It combines additive (3D printing) and subtractive (CNC machining) education, helping students bridge the gap between classroom learning and real-world industrial practice. <ol start="2"> <li>How does the LS Manufacturing Technical Grant benefit University of Michigan students?</li> </ol> The LS Manufacturing Technical Grant provides selected students and faculty projects with in-kind sponsorship. This includes DFM (Design for Manufacturability) feedback, rapid prototyping services, and production support using advanced manufacturing technologies. It reduces project costs, shortens lead times, and gives students direct access to industry-level expertise. <ol start="3"> <li>Who can apply for the LS Manufacturing Technical Grant at the University of Michigan?</li> </ol> The grant is open to University of Michigan students, faculty members, and research teams involved in academic or innovation-based projects. Applications can be submitted through the University of Michigan Engineering Department’s partnership portal, detailing project goals and manufacturing requirements. <ol start="4"> <li>What kind of real-world experience do students gain through this partnership?</li> </ol> Students gain real-world manufacturing experience by collaborating directly with LS Manufacturing engineers, learning about design for manufacturability, rapid prototyping, and low-volume production. They also gain exposure to digital tools like instant quoting platforms and online manufacturing networks, preparing them for careers in modern industry. <ol start="5"> <li>How can faculty or student teams learn more about the LS Manufacturing partnership?</li> </ol> Interested participants can visit the University of Michigan College of Engineering’s Partnership Page or contact the department directly for detailed program information. The page includes application guidelines, eligibility details, and examples of past capstone project sponsorships supported by LS Manufacturing.

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Further help
by Emily Cioppa 29 Oct '25

29 Oct '25

Good evening, In addition to my previous question, I am also having difficulty appending chains. If I import molecular models into Chimera/ChimeraX that each have individual model names and singular Chain IDs, is there a way to combine these into a singular model and renumber the residues as one continuous sequence throughout the combined model? For example, I have three molecular models that are each components of a single RNA molecule, and each have their own pdb file and a singular Chain ID. I know how to physically orient all of them spatially and renumber the residues of each such that when hovering over the molecular model moving from 5’ to 3’ the sequence numbering is continuous and correct across all chains. However, even when I combine the three individual models into one at the beginning and change the chain IDs of all three to be the same ID at the end, when I view the combination model in sequence viewer, it has just appended all three chains together with no regard to residue order. Since each of the three models is a chunk of double helix, I would need the numbering to be in 5’ to 3’ order throughout the entire combination model sequence viewer, in the way that I have renumbered it and in the way that it is in the visible combined model/structure. Thank you for your help.

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Help with Chain ID commands
by Emily Cioppa 29 Oct '25

29 Oct '25

Good evening, I have a quick question regarding the changechains command in Chimera/ChimeraX. If I have a single model open that inherently has one single chain, is there a way to select a continuous strand of residues in the sequence and change the Chain ID of only the selected residues to something else? It seemed from my online research that this is possible, however, I cannot get it to work. Any advice would be appreciated as soon as possible. Thank you. Best, Emily Cioppa Research Assistant The Rockefeller University

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Average attribute
by Reza Khayat 29 Oct '25

29 Oct '25

Hi, How do I average atom attributes to residue attributes? Let's assume the attributes name is mapvalues. Thanks. Best wishes, Reza Reza Khayat, PhD City College of New York Department of Chemistry and Biochemistry

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Align x,y,z axis of Proteins
by Hübbers, Jan 29 Oct '25

29 Oct '25

Hey support, I have defined x, y, z symmetry axis for a protein complex by forcing axis through centroids of the different subunits. I also created x, y ,z axis that meet at the origin of my scene. Is it possible to align the protein axis to the scene axis? Best, Jan ________________________________________________________________ Dr. rer. nat. Jan W. Hübbers Postdoctoral researcher RWTH Aachen University, Institute for Biology I, Unit of Plant Molecular Cell Biology Assistant Features Editor The Plant Cell, American Society of Plant Biologists Worringerweg 1, 52074 Aachen, Germany +49 (0)241 80 28130 http://www.bio1.rwth-aachen.de/PlantMolCellBiology/index.html<https://urldefense.com/v3/__http:/www.bio1.rwth-aachen.de/PlantMolCellBiolo…> “The greatest value of a picture is when it forces us to notice what we never expected to see.” John W. Tukey

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ChimeraX pre-built tar package
by Elaine Meng 28 Oct '25

28 Oct '25

> On Oct 22, 2025, at 3:57 PM, Charitha Belluru Shetty via Chimera <chimera(a)cgl.ucsf.edu> wrote: > > Hi Team, > We have the license for ChimeraX in name of Jim Thorpe. Would it be possible to provide the pre-built tar package of the latest version for Redhat 9. > With the previous version we were able to download the pre-build tar package from your website (example: ChimeraX-0.93.tar.gz), but now I see there is only .rpm package (https://www.rbvi.ucsf.edu/chimerax/download.html ) which will need to be installed in the OS level. I was looking to get a pre-build tar file for the latest version so we can install it without having to do the rpm install. I am aware there is github source for ChimeraX where we can build but would greatly appreciate if you could provide tar installer. Thank you! > $ cat /etc/redhat-release > Red Hat Enterprise Linux release 9.4 (Plow) > Best Regards, > Charitha Shetty Hello Charitha Shetty, ChimeraX usage & support questions should be sent to chimerax-users(a)cgl.ucsf.edu <mailto:chimerax-users@cgl.ucsf.edu> (without any data that should be kept private) since the commercial licensing team cannot answer that type of thing. I've CCd that address so you don't need to send your question again. I don't see that as an option on our download page, so my guess is probably not, but we can see if others on the list respond. Regards, Elaine ----- Elaine C. Meng, Ph.D. UCSF Chimera(X) team Resource for Biocomputing, Visualization, and Informatics Department of Pharmaceutical Chemistry University of California, San Francisco

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Problems with script
by George Tzotzos 28 Oct '25

28 Oct '25

I’d be grateful for your help My script is: # Auto-generated by make_chimerax_assets.py # Visualize L1 composition divergence on delta (1PN9) and epsilon (2IMI) open viz/delta_1PN9.pdb open viz/epsilon_2IMI.pdb defattr viz/delta_div.defattr model #1 defattr viz/epsilon_div.defattr model #2 style #1,#2 cartoon cartoon smoothRibbon true color byattribute divergence palette bluesred range 0,1 #1 color byattribute divergence palette bluesred range 0,1 #2 key colorbar palette bluesred range 0,1 label "Δ composition (L1)" pos 0.85,0.15 size 0.03,0.5 lighting soft zoom true When I try to open the color_delta_epsilon_divergence.cxs (see above), I get: RuntimeError: Not a ChimeraX session file File "/Applications/ChimeraX-1.10.1.app/Contents/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-packages/chimerax/core/session.py", line 798, in restore raise RuntimeError("Not a ChimeraX session file”) Thank you

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MCP for ChimeraX
by Alexis Rohou 27 Oct '25

27 Oct '25

Hi all, I would like to use ChimeraX via an agent. Quick googling suggests I'm not the first person to think of this (here <https://github.com/chatmol/molecule-mcp>, here <https://github.com/GDAmitha/chimerax-alphafold-mcp>), but before I dive in I thought I'd check - anyone else actively working on this? Or maybe you have worked on it and hit a roadblock? Cheers, Alexis

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Problem with Boltz-2
by Dr. Oscar Perez 23 Oct '25

23 Oct '25

Hello ChimeraX Support, I am trying to use Boltz within ChimeraX to analyze ligand binding affinity, but I cannot find the corresponding option. I do not see any menu item or text that says “Predict Binding Affinity for.” [cid:51284bde-0c95-4cd2-bdd4-9570eef8bf69] When I run an example similar to the one shown in your video for the HIV protease<https://www.youtube.com/watch?v=h06yOBcaOqc> to evaluate ligand interactions, I obtain the generated 3D structure, but no table with ligand prediction values is produced. I installed ChimeraX just yesterday, so I assume I am using the latest version. Boltz is installed inside ChimeraX as well. Could you please advise how I can obtain the ligand interaction values? Thank you, Oscar Oscar Perez-Leal, MD Associate Professor Moulder Center For Drug Discovery Research Temple University School of Pharmacy 3307 N Broad St, Room 556 Philadelphia, PA, 19140 Tel: 215-707-4871 [cid:e222d198-ed2f-42a9-91a3-dab997f1387c]<https://outlook.office.com/bookwithme/user/3647ce5c96e849969435512aaf86933a…> Book time to meet with me<https://outlook.office.com/bookwithme/user/3647ce5c96e849969435512aaf86933a…>

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Question about density map visualization for figures using ChimeraX
by Abhipsa Shatarupa 23 Oct '25

23 Oct '25

Hello, I am currently preparing figures for a publication and am using ChimeraX to render a density map. The color of the mesh representation I am using is set to *licorice*, but after I save the image in TIFF/PNG format at 7602 × 5680 resolution, the mesh appears quite faint. Could you please advise on how to make the density appear darker or more prominent in the saved image? Thank you! -Abhipsa

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Building ions using ISOLDE
by Przemyslaw Dutka 22 Oct '25

22 Oct '25

Hello, I am currently encountering an issue while trying to build Na ions with ISOLDE. Despite various attempts, the ions consistently move outside the density as soon as the simulation begins. The ion site is clearly defined by previous crystallography maps. I have also downloaded several EM maps that include modeled Na ions, such as PDB 6VWX (see below). In these cases, the ion still moves up or down the channel once the simulation starts. The only method I've found to keep the ion in place is by pinning it. I would greatly appreciate any advice or tips. [image: Screenshot 2025-10-21 at 10.33.05 PM.png] Best, Przemek

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building on macOS
by Alexis Rohou 21 Oct '25

21 Oct '25

Hello, I'd like to build from source in order to play with (and possibly hack at) the MCP server. I am on macOS 14.7.6 with Xcode 16.2. I think the compilation went well, but at link time I get warnings and an error. Below is the end of the output of `make install`. What do you recommend I try? Cheers, Alexis available bundle cache has not been initialized yet Executing: devel install . user false exit true noDeps true ld: warning: object file (/Users/rohoua/work/git/ChimeraX/src/bundles/atomic_lib/atomic_cpp/pyinstance_cpp/PythonInstance.o) was built for newer 'macOS' version (11.0) than being linked (10.9) ld: warning: object file (/Users/rohoua/work/git/ChimeraX/src/bundles/atomic_lib/atomic_cpp/element_cpp/Element.o) was built for newer 'macOS' version (11.0) than being linked (10.9) ar: src/lib/libatomstruct_tmpl.a is a fat file (use libtool(1) or lipo(1) and ar(1) on it) ar: src/lib/libatomstruct_tmpl.a: Inappropriate file type or format Traceback (most recent call last): File "/Users/rohoua/work/git/ChimeraX/ChimeraX.app/Contents/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-packages/setuptools/_distutils/spawn.py", line 87, in spawn subprocess.check_call(cmd, env=_inject_macos_ver(env)) File "/Users/rohoua/work/git/ChimeraX/ChimeraX.app/Contents/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/subprocess.py", line 413, in check_call raise CalledProcessError(retcode, cmd) subprocess.CalledProcessError: Command '['/usr/bin/xcrun', 'ar', 'rcs', 'src/lib/libatomstruct_tmpl.a', 'atomic_cpp/atomstruct_cpp/tmpl/Atom.o', 'atomic_cpp/atomstruct_cpp/tmpl/Bond.o', 'atomic_cpp/atomstruct_cpp/tmpl/CoordSet.o', 'atomic_cpp/atomstruct_cpp/tmpl/Molecule.o', 'atomic_cpp/atomstruct_cpp/tmpl/Residue.o', 'atomic_cpp/atomstruct_cpp/tmpl/TemplateCache.o', 'atomic_cpp/atomstruct_cpp/tmpl/amino.o', 'atomic_cpp/atomstruct_cpp/tmpl/camino.o', 'atomic_cpp/atomstruct_cpp/tmpl/findres.o', 'atomic_cpp/atomstruct_cpp/tmpl/general.o', 'atomic_cpp/atomstruct_cpp/tmpl/ions.o', 'atomic_cpp/atomstruct_cpp/tmpl/namino.o', 'atomic_cpp/atomstruct_cpp/tmpl/nucleic.o']' returned non-zero exit status 1.

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questions for ChimeraX
by Jéromine Carret 21 Oct '25

21 Oct '25

Hello, My name is Jéromine, and I am a PhD student at the University of Lille, France. We are working on structural modelling of different protein variants. We have questions about the ChimeraX software tools. We would like to obtain electrostatic maps of protein structures and avoid using the colour scale in order to obtain numerical results. And also for hydrophobicity maps. We also want to study the clashes between the positions of variants. Do you have any advice? For the matchmaker command, can you give me the information I need to understand the results? Thank you in advance for your reply. Kind regards. Jéromine Carret PhD candidate RADEME lab ULR 7364 Université de Lille

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chimeraX daily built, 2025 Oct 20, boltz-2 empty sequence line in yaml file
by Guenter Fritz 20 Oct '25

20 Oct '25

Dear ChimeraX developers, really a great job implementing boltz into chimeraX !! I have just installed the latest daily build 2025 Oct 20 on a Redhat 8 (Rocky 8 derivative) machine. Boltz-2 installs with no visible problem via chimeraX (like before). When I try to run predictions, I get an error which seems to be due to an almost empty yaml file created by chimeraX. Only the first line ("version 1.0") is in the yaml file. Boltz (of course) fails. There should be no problem with permissions. I just installed also the latest release of chimeraX and boltz-1 via chimeraX. Runs as expected. PS: I had no try yet on my mac (will check later). Best wishes, Guenter

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Problems adjusting the phi/psi angles with ChimeraX
by Gong, Zhen 15 Oct '25

15 Oct '25

Dear ChimeraX team, I was trying to use ChimeraX to change the phi/psi angles of a residue in the loop region but encoured this error: ILE 411 N ↔ CA is part of a ring/cycle and cannot be rotated. There is no ring/cycle in ILE411 or neibouring residues: ASN 410 or THR 412. I tried ChimeraX daily (version 1.10.dev202504260127 (2025-04-26) and ChimeraX 1.10.1 but the same error happened. I am wondering if it is possible to change the phi/psi angles with ChimeraX. Thank you. Best, Zhen

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Chimera and ChimerX issues after update to MacOS Tahoe
by Rechiche, Othman 14 Oct '25

14 Oct '25

Hi everyone, I recently updated to MacOS Tahoe, Since then I encountered several issues with Chimera, ChmieraX and python. I installed and removed and reinstalled the apps but I still get the same error. For chimera I get this error: [Screenshot 2025-09-24 at 12.08.51 AM.png] FOr ChimeraX, when I try to open a session, it complains that the session was created with another version of python. I opened that session successfully several times before to the update of MacOS and I have never seen this error before. Failed opening file /Users/x/x/x/x/x/x/x/x.pyc: Python code was compiled for a different version of Python Can you please help me fix this? Best Regards, Othman Dr. Othman Rechiche Herbert Irving Comprehensive Cancer Center Columbia University Medical Center Columbia University New York, NY 10032 email: or2296(a)cumc.columbia.edu phone: +1 (814) 880-5554

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help on color command
by James Raymond 12 Oct '25

12 Oct '25

Dear ChimeraX, I have tried 100 variations of color command without success. Can you tell me the command to color residues 132-145 red in this single chain protein? thank you Jim [image: image.png]

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Issue with combining two pdb models in chimeraX
by Rayees Mattoo 10 Oct '25

10 Oct '25

Hi, I have two models #1 Model1.pdb and #2 Model2.pdb having one shared polypeptide, same chain ID but different residue numbers. I wanted to combine them to make a merged_model #3. I used the following combine commandline in chimeraX: combine #1 #2 close false modelId #3 retainIds true name merged_model The resulting combined model appeared to be correct, and I proceeded to run phenix.real_space_refine without any issues. However, when I attempted to deposit the refined model (either in .pdb or .cif format) with the wwPDB, I received a file with multiple errors (see attached). Interestingly, I had previously deposited the individual models (#1 and #2) without any problems. This situation raises my concern about whether the combination process was successful. Is there anything I should have done differently to ensure a seamless combination of the models? Best Rayees

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ChimeraX-1.10.1 syntax issue
by wwvivian.wang＠mail.utoronto.ca 10 Oct '25

10 Oct '25

Hi, this is my first time using ChimeraX-1.10.1 and I ran into a little bit of trouble with syntax errors in this version.\ I opened a pdb file that contains two chains of proteins that I'm interested in - Chain A and B. I then renamed and coloured them to Chain C and D for clarity. In the Contacts window, I made the following changes: Find pairs of atoms with: ✅ VDW overlap ≥ –0.4 Å Limit by selection: ✅ with at least one end selected Ignore interactions between atoms 4 or fewer bonds apart: ✅ Ignore interactions between residues <5 apart: ✅ Include intermodel: ✅ Include intramodel: ❌ (uncheck it) Include intramolecule: ❌ (uncheck it) Ignore hidden models: ✅ Display as pseudobonds: ✅ (keep green, radius 0.075, dashes 6) Write info to: Log ✅ Then click Apply I then selected the atomic model #1 (Chain C+D) and deselected surface models #1.1 (Chain C) and #1.2 (Chain D) and ran the Contacts Command: "contacts atoms #1/C #1/D makePseudobonds true distanceCutoff 4.0 log true" but the software returns "Expected a keyword" argument and highlighted "distanceCutoff 4.0 log true" in red. Alternatively, I also tried "findclash #1/C test #1/D overlapCutoff -0.4 hbondAllowance 0 interModel true intraMol false intraRes false makePseudobonds true select true log true" but again it fails to output contact coordinates between the two chains and returns the following: "Unknown command: findclash #1/C test #1/D overlapCutoff -0.4 hbondAllowance 0 interModel true intraMol false intraRes false makePseudobonds true select true log true". I would appreciate your help in resolving this error for me. Thanks, Vivian

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Focus in ChimeraX
by Luca Pellegrini 10 Oct '25

10 Oct '25

Hi, What is the ChimeraX equivalent to the Focus command in Chimera? I have selected a portion of a structure, and would like to bring it into focus without dragging it into view. Also Focus would automatically set the selection as the pivot point. Best wishes, Luca Luca Pellegrini, PhD Department of Biochemistry University of Cambridge Cambridge CB2 1GA lp212(a)cam.ac.uk

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Question about using ChimeraX
by 张圃源 09 Oct '25

09 Oct '25

Hi， I'm a new user of ChimeraX and I'm currently facing a problem. I want to convert a pdb file into an mrc file that can be input into cryoSPARC, and this mrc file should be in the form of a cube volume. I will use ChimeraX to achieve this. How should I proceed? Best Yuan 中山大学张圃源

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