I was hoping to make some single amino acid substitutions in the context of a protein binding interface.  I've only briefly poked around, but so far the only way I see to do this is to delete existing atoms/bonds one by one, and then rebuild (the alternate amino acid) atom-by-atom/bond-by-bond.  Is there an easier way (like, telling the program to substitute an Asp for a Lys, or something akin to this)?  Thanks in advance for any suggestions.

Andy Hinck