Dear Amber users and developers,
I need to parameterize a modified amino acid, a carboxylated lysine (code: KCX).
According to ff14SB atom types, the atom type of the carbon atom of the carboxylate group should be CO.
When I run parmchk2, I see the following error message:
Atom type of CO does not shown up in PARMCHK.DAT
Is it a bug or am I doing something wrong?
I am using the new AmberTools20.
I thank you in advance for your support.
Best,
Tommaso
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Received on Tue May 05 2020 - 12:00:02 PDT
