pdb_mtrix_matrices (
        pdb_headers,
        add_identity=True,
        given=False,
        )

The "given" flag indicates which MTRIX records should be returned. The PDB MTRIX records have a "given" field which indicates whether or not the transformed coordinates are already given in the PDB entry.

pdb_biomt_matrices ( pdb_headers )

pdb_smtry_matrices ( pdb_headers )

pdb_remark_matrices (
        pdb_headers,
        remark_number,
        tag_name,
        )