Hello, I hope you are well. I have a quick question about the bond command. I attached the pdb file I have been using to try and learn this command. I am having a hard time figuring out how I should write it on the command line. If I want to create a bond between residue Lys76 from the antibody and the Oxygen #2 from my polymer, how would I write it on the command line? bond :lys76:O2 I have read the section in the manual but I think I am misunderstanding something, it keeps giving me a mangled atom specifier. Also, I figured out the problem from my last question/email about the volume in my viral capsid. :) Thank you for your help on that one Elaine. Thank you, Heather Noriega PhD-Pharmaceutical Science student Howard University heather.noriega@bison.howard.edu 520-203-1883