Chains and heterogens:
PDB Chain Sequences:
>1fqkA (A:) rtvkllllgagesgkstivkqmkiihqdgysleeclefiaiiygntlqsilaivramttl niqygdsarqddarklmhmadtieegtmpkemsdiiqrlwkdsgiqacfdraseyqlnds agyylsdlerlvtpgyvpteqdvlrsrvkttgiietqfsfkdlnfrmfdvggqrserkkw ihcfegvtaiifcvalsdydlvlaedeemnrmhesmklfdsicnnkwftdtsiilflnkk dlfeekikksplticypeyagsntyeeagnyikvqflelnmrrdvkeiyshmtcatdtqn vkfvfdavtdiiikenlk
>1fqkB (B:) lvdiptkmrverwafnfselirdpkgrqsfqhflrkefsgenlgfweacedlkygdqskv kekaeeiyklflapgarrwinidgktmditvkglkhphryvldaaqthiymlmkkdsyar ylkspiykemlakaie
>1fqkC (C:) tvkllllgagesgkstivkqmkiihqdgysleeclefiaiiygntlqsilaivramttln iqygdsarqddarklmhmadtieegtmpkemsdiiqrlwkdsgiqacfdraseyqlndsa gyylsdlerlvtpgyvpteqdvlrsrvkttgiietqfsfkdlnfrmfdvggqrserkkwi hcfegvtaiifcvalsdydlvlaedeemnrmhesmklfdsicnnkwftdtsiilflnkkd lfeekikksplticypeyagsntyeeagnyikvqflelnmrrdvkeiyshmtcatdtqnv kfvfdavtdiiikenlk
>1fqkD (D:) fwdlnaklvdiptkmrverwafnfselirdpkgrqsfqhflrkefsgenlgfweacedlk ygdqskvkekaeeiyklflapgarrwinidgktmditvkglkhphryvldaaqthiymlm kkdsyarylkspiykemlakaie