On Dec 19, 2024, at 3:51 PM, Daniel Elnatan via ChimeraX-users <chimerax-users@cgl.ucsf.edu> wrote:
So, if I’m looking at the C-alpha, then the psi angle would be on the N-terminal side and the phi angle would be on the C-terminal side?
It's the other way 'round: phi is around N-CA and psi is around CA-C. For example, see the diagram for Ramachandran plot on wikipedia: <https://en.wikipedia.org/wiki/Ramachandran_plot> My personal mnemonic (not saying it's a good one) is that N->C is phi,psi ... the opposite of sci-fi (science fiction). 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