Dear All I have a Chimera session in which I have 6 sets of PDB files (ribbon representation) showing variability in the structures. However I wish to display only few of the subunits. Questions are: 1. How do I delete undesired subunits from all the chains on the command line 2. How do I select particular residues from specific chains (not all the 6). Thanks Andy Dr. Anindito Sen (Ph.D) Research Associate , Dept. of Biochemistry and Molecular Genetics University of Virginia Box 800733 Charlottesville, VA 22908