Sorry I used the wrong address for the message below. ---------- Forwarded message ---------- From: Francesco Pietra <chiendarret@gmail.com> Date: Fri, Oct 31, 2008 at 8:34 AM Subject: Combining fragments for RESP charges To: chimera-users-request@cgl.ucsf.edu I was reading Ross Walker's tutorial A1, in the suite of tutorials for Amber. When deriving RESP charges for an unusual molecule covalently bound to a protein, the unusual molecule is first detached from the protein and then further divided into fragments. RESP charges are derived for the fragments, then the fragments are recombined using Sirius visualization program. The recombined fragments are then attached to the protein, again using Sirius. Can these recombinations be carried out with Chimera? Thanks francesco pietra