Hi Monisha, If you don't need to make a bond between them (cofactor is noncovalent), you can just use the command "combine," or equivalently, the "copy/combine" function in the Model Panel. The Model Panel is under Favorites in the menu; you would just choose the two models you want to merge in the left side of that panel, then click the "copy/combine" button on the right. <http://www.cgl.ucsf.edu/chimera/docs/UsersGuide/midas/combine.html> <http://www.cgl.ucsf.edu/chimera/docs/UsersGuide/modelpanel.html> If you need to make a bond between them, you would use the Build Structure tool (under Tools... Structure Editing in the menu), Join Models tab. <http://www.cgl.ucsf.edu/chimera/docs/ContributedSoftware/editing/editing.htm...> 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 11, 2011, at 11:46 AM, Monisha Hajra wrote:
Hi, I have modeled one protein. I have pdb file of the protein. I want to merge the protein with one co-factor (I have the pdb file for the same). Can I merge them in one file using Chimera? If not, then any other tool can you suggest? Regards Monisha