Hi all, I would like to learn how to add a phosphate group to a particular residue, resembling phosphorylation of a particular residue, to a PDB structure. If this is doable using Chimera I would really appreciate any hints on how to do this. Also, I am new to Chimera but I was wondering if there was a way of adding ATP to a designated ATP binding site. I would very much appreciate any responses, Thanks, Carlos Donado The information in this e-mail is intended only for the person to whom it is addressed. If you believe this e-mail was sent to you in error and the e-mail contains patient information, please contact the Partners Compliance HelpLine at http://www.partners.org/complianceline . If the e-mail was sent to you in error but does not contain patient information, please contact the sender and properly dispose of the e-mail.