XmlmmCIF equivalent: entity_poly Data items in the ENTITY_POLY category record details about the polymer, such as the type of the polymer, the number of monomers, and whether it has non-standard features. XmlmmCIF equivalent: entity_poly/nstd_chirality A flag to indicate whether or not the polymer contains at least one monomer unit with chirality different from that specified in _entity_poly.type. XmlmmCIF equivalent: entity_poly/nstd_linkage A flag to indicate whether or not the polymer contains at least one monomer-to-monomer linkage different from that implied by _entity_poly.type. XmlmmCIF equivalent: entity_poly/nstd_monomer A flag to indicate whether or not the polymer contains at least one monomer that is not considered standard. XmlmmCIF equivalent: entity_poly/number_of_monomers The number of monomers in the polymer. XmlmmCIF equivalent: entity_poly/pdbx_seq_one_letter_code Chemical sequence expressed as string of one-letter amino acid codes. Modifications and non-standard amino acids are coded as X. XmlmmCIF equivalent: entity_poly/pdbx_seq_one_letter_code_can Cannonical chemical sequence expressed as string of one-letter amino acid codes. Modifications are coded as the parent amino acid where possible. A for alanine or adenine B for ambiguous asparagine/aspartic-acid R for arginine N for asparagine D for aspartic-acid C for cysteine or cystine or cytosine Q for glutamine E for glutamic-acid Z for ambiguous glutamine/glutamic acid G for glycine or guanine H for histidine I for isoleucine L for leucine K for lysine M for methionine F for phenylalanine P for proline S for serine T for threonine or thymine W for tryptophan Y for tyrosine V for valine U for uracil XmlmmCIF equivalent: entity_poly/pdbx_strand_id The PDB strand/chain id(s) corresponding to this polymer entity. XmlmmCIF equivalent: entity_poly/type The type of the polymer. XmlmmCIF equivalent: entity_poly/type_details A description of special aspects of the polymer type. XmlmmCIF equivalent: entity_poly/entity_id This data item is a pointer to _entity.id in the ENTITY category.