Hi Jiri, As I understand it, you would need to open two separate copies of the structure, superimpose the two sets of atoms for which you want to see the axis (like A to B, or domain 1 of A to domain 2 of A), and then use command “measure rotation”. <http://www.rbvi.ucsf.edu/chimera/docs/UsersGuide/midas/measure.html#rotation> There are various different ways to superimpose sets of atoms as discussed here: <http://www.rbvi.ucsf.edu/chimera/docs/UsersGuide/superposition.html> I hope this helps, Elaine ---------- Elaine C. Meng, Ph.D. UCSF Computer Graphics Lab (Chimera team) and Babbitt Lab Department of Pharmaceutical Chemistry University of California, San Francisco
On Nov 20, 2016, at 2:30 PM, chemocev marker <jirivitali@gmail.com> wrote:
Hi All I am interested to measure the symmetry axis of individual sub-unit (chain A & chain B) along with the symmetry axis of the heterodimer (AB). Each chain has 2 domains and 2 fold rotations axis, and I can measure by removing 1 chain and measure for the other. Is there way to measure the inter-domain symmetry axis of the heterodimer molecule. best Jiri