Hi Sabuj, There is no user interface way to do that (you'd have to get into code)... however, your question is quite timely, as there is a new plugin that provides a Rotamers-type interface to hundreds of nonstandard residues. It also makes a new command "swapnaa" to access these residues via command line. This SwissSidechain plugin is provided by the Molecular Modelling Group at SIB. Information and download: <http://ludwig-sun1.unil.ch/~dgfeller/SwissSidechain/chimera.html> You can browse the SwissSidechain database to see if it includes your residue of interest: <http://ludwig-sun1.unil.ch/~dgfeller/SwissSidechain/table.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 Dec 5, 2011, at 10:31 AM, Sabuj Pattanayek wrote:
Hi, How do I add custom residues so that they're usable with swapaa or the rotamer tool? Thanks, Sabuj