loop_ _pdbx_entity_branch_link.link_id _pdbx_entity_branch_link.entity_id _pdbx_entity_branch_link.entity_branch_list_num_1 _pdbx_entity_branch_link.comp_id_1 _pdbx_entity_branch_link.atom_id_1 _pdbx_entity_branch_link.leaving_atom_id_1 _pdbx_entity_branch_link.atom_stereo_config_1 _pdbx_entity_branch_link.entity_branch_list_num_2 _pdbx_entity_branch_link.comp_id_2 _pdbx_entity_branch_link.atom_id_2 _pdbx_entity_branch_link.leaving_atom_id_2 _pdbx_entity_branch_link.atom_stereo_config_2 _pdbx_entity_branch_link.value_order _pdbx_entity_branch_link.details 1 2 1 NAG O4 HO4 ? 2 GAL C1 O1 R sing ? 2 2 2 GAL O2 HO2 ? 3 FUC C1 O1 R sing ? 3 2 1 NAG O3 HO3 ? 4 FUC C1 O1 R sing ?