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