Hi Francesco, If they are already called chain A and B, you can split the chains in one model to make separate models using the command "split": <http://www.cgl.ucsf.edu/chimera/docs/UsersGuide/midas/split.html> For example, if your structure with chains A and B is open as model 0, command: split #0 ... will make two models, model #0.1 with chain A and #0.2 with chain B. Even though they are still both #0 you can refer to them separately as #0.1 and #0.2, move them separately, etc. However, if they are currently both chain A, that will not do anything. To make separate models, you would have to open the receptor+ligand structure two times and in one copy, delete the ligand, and in the other copy, delete the receptor. Alternatively, you could manually text-edit the PDB file so make the ligand chain B before opening it in Chimera, and then use the "split" method. 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 Apr 29, 2011, at 3:55 AM, Francesco Burresi wrote:
Hi, I've docked a ligand with a receptor and I get a pdb with1 chain (chain A) I'd like to separate recpetor-ligand in two different chians (chain A e chain B). How can I do that in Chimera? regards