Dear Chimera experts, I am willing to build a peptide "linker" connecting two different pdb chains, that is to connect two existing pdb chains with a new peptide chain, and if possible minimize it. Is it possible to do that wich chimera? I know the command addaa, but to my best understanding this command it's not able to connect the end of the new peptide with the beginning of the second chain. Any suggestions will be greatly appreciated. Best regards and thanks a lot in advance, Fabian -- Fabian Glaser, PhD Bioinformatics Knowledge Unit, The Lorry I. Lokey Interdisciplinary Center for Life Sciences and Engineering Technion - Israel Institute of Technology Haifa 32000, ISRAEL Web: http://bku.technion.ac.il Email: fglaser@tx.technion.ac.il Tel: +972-(0)4-8293701 Cel: +972-(0)54-4772396