XmlmmCIF equivalent: struct_asym Data items in the STRUCT_ASYM category record details about the structural elements in the asymmetric unit. XmlmmCIF equivalent: struct_asym/details A description of special aspects of this portion of the contents of the asymmetric unit. XmlmmCIF equivalent: struct_asym/entity_id This data item is a pointer to _entity.id in the ENTITY category. XmlmmCIF equivalent: struct_asym/pdbx_blank_PDB_chainid_flag A flag indicating that this entity was originally labeled with a blank PDB chain id. XmlmmCIF equivalent: struct_asym/pdbx_modified This data item indicates whether the structural elements are modified. EBI Item. Accesible surface area of the assembly as calculated by PQS EBI Item. The chain id from the PDB file EBI Item to indicate whether the chain is present in the original PDB file (Y) or is the result of symmetry expansion of the asymetric unit during PQS (N) XmlmmCIF equivalent: struct_asym/id The value of _struct_asym.id must uniquely identify a record in the STRUCT_ASYM list. Note that this item need not be a number; it can be any unique identifier.