[PyMOL] Changing ligand conformation

[Mark B. <mj...@ca...>]

I have a pdb file of a protein which contains a lysine residue bound to 
a ligand. The ligand has two conformations due to a cis/trans 
isomerisation. I have created a pdb file (also .mol and .mol2) of lysine 
attached to the cis form and would like to replace the 
lysine-ligand(trans) form which is currently in the protein structure 
with the lysine-ligand(cis) form. Does anyone know how to do this; 
mutagenesis only gives me the option of standard amino acids and also 
does not remove the existing ligand.

Many thanks,

Mark.