dear modeller iam modeling a model which has hetero atom FE in it active site the FE is present in my template and in my target.so in order to model my model with hetero atom what should i do.

sir in library of atom residue(i.e .,in modlib/restyb.lib) as FE is not found what should i give pdb three and one letter code and CHARMM code.

is this process is correct

thanking in regards

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