Data items in the PDBX_ENTITY_BRANCH_LIST category specify the list of monomers in a branched entity. Allowance is made for the possibility of microheterogeneity in a sample by allowing a given sequence number to be correlated with more than one monomer ID. The corresponding ATOM_SITE entries should reflect this heterogeneity.
loop_ _pdbx_entity_branch_list.entity_id _pdbx_entity_branch_list.num _pdbx_entity_branch_list.comp_id _pdbx_entity_branch_list.hetero 2 1 NAG n 2 2 GAL n 2 3 FUC n 2 4 FUC n