Hi Haiqin, You are looking at a Chimera tutorial and trying to use it with ChimeraX. But Chimera and ChimeraX are two different programs and many of the tools and commands are a bit different. So if you want to learn ChimeraX you should try ChimeraX tutorials. Tom

On Dec 19, 2023, at 8:21 AM, Elaine Meng via ChimeraX-users <chimerax-users@cgl.ucsf.edu> wrote:

Hello Haiqin Du, You need to get a newer ChimeraX, the 1.7 release or a 1.8 daily build. According to the Change Log, this feature was added after the 1.6 release branch:

<https://www.rbvi.ucsf.edu/trac/ChimeraX/wiki/ChangeLog>

If you use the User Guide in the Help menu, it should match the version you downloaded. If you instead search the web and find the User Guide on our website, the information may be newer than the version of the program you are using.

I hope this helps, Elaine ----- Elaine C. Meng, Ph.D. UCSF Chimera(X) team Department of Pharmaceutical Chemistry University of California, San Francisco

...

On Dec 18, 2023, at 8:05 PM, duhq via ChimeraX-users <chimerax-users@cgl.ucsf.edu> wrote:

Hello, I'm a freshman to ChimeraX. I'm building an atomic structure of a synthetic peptide-like compound, following the online tutorial, https://www.cgl.ucsf.edu/chimera/docs/ContributedSoftware/editing/editing.ht...

I copied a SMILES string from the SMILES translator, and it gives a structure. Very good. But I want to adjust some bond angles. But I can't find the Adjust Torsions section in the dialogue of Build Structure (see the screen-print below). I can't active it by using the "rotation" command either, even though the target bond is already selected.

<Adjust Torsions missing.png>

Would you please help me to figure out this? Best regards,

Haiqin DU duhq

duhq@fudan.edu.cn

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