XmlmmCIF equivalent: pdbx_entity_src_syn PDBX_ENTITY_SRC_SYN records the details about each chemically synthesized molecule (entity) in the asymmetric unit. XmlmmCIF equivalent: pdbx_entity_src_syn/details A description of special aspects of the source for the synthetic entity. XmlmmCIF equivalent: pdbx_entity_src_syn/entity_id This data item is a pointer to _entity.id in the ENTITY category.