loop_ _pdbx_struct_assembly_gen.assembly_id _pdbx_struct_assembly_gen.asym_id_list _pdbx_struct_assembly_gen.oper_expression 1 A 1 1 B 1 2 A 2 2 B 2 2 C 2 3 A 3 3 B 3 3 D 3
loop_ _pdbx_struct_assembly_gen.assembly_id _pdbx_struct_assembly_gen.asym_id_list _pdbx_struct_assembly_gen.oper_expression 1 'A,B' 1 2 'A,B,C' 2 3 'A,B,D' 3