Chains and heterogens:
PDB Chain Sequences:
>1iu4A (A:) dsddrvtppaepldrmpdpyrpsygraetvvnnyirkwqqvyshrdgrkqqmteeqrewl sygcvgvtwvnsgqyptnrlafasfdedrfknelkngrprsgetraefegrvakesfdee kgfqrarevasvmnralenahdesayldnlkkelangndalrnedarspfysalrntpsf kernggnhdpsrmkaviyskhfwsgqdrsssadkrkygdpdafrpapgtglvdmsrdrni prsptspgegfvnfdygwfgaqteadadktvwthgnhyhapngslgamhvyeskfrnwse gysdfdrgayvitfipkswntapdkvkqgwp
>1iu4B (B:) dsddrvtppaepldrmpdpyrpsygraetvvnnyirkwqqvyshrdgrkqqmteeqrewl sygcvgvtwvnsgqyptnrlafasfdedrfknelkngrprsgetraefegrvakesfdee kgfqrarevasvmnralenahdesayldnlkkelangndalrnedarspfysalrntpsf kernggnhdpsrmkaviyskhfwsgqdrsssadkrkygdpdafrpapgtglvdmsrdrni prsptspgegfvnfdygwfgaqteadadktvwthgnhyhapngslgamhvyeskfrnwse gysdfdrgayvitfipkswntapdkvkqgwp
>1iu4C (C:) dsddrvtppaepldrmpdpyrpsygraetvvnnyirkwqqvyshrdgrkqqmteeqrewl sygcvgvtwvnsgqyptnrlafasfdedrfknelkngrprsgetraefegrvakesfdee kgfqrarevasvmnralenahdesayldnlkkelangndalrnedarspfysalrntpsf kernggnhdpsrmkaviyskhfwsgqdrsssadkrkygdpdafrpapgtglvdmsrdrni prsptspgegfvnfdygwfgaqteadadktvwthgnhyhapngslgamhvyeskfrnwse gysdfdrgayvitfipkswntapdkvkqgwp
>1iu4D (D:) dsddrvtppaepldrmpdpyrpsygraetvvnnyirkwqqvyshrdgrkqqmteeqrewl sygcvgvtwvnsgqyptnrlafasfdedrfknelkngrprsgetraefegrvakesfdee kgfqrarevasvmnralenahdesayldnlkkelangndalrnedarspfysalrntpsf kernggnhdpsrmkaviyskhfwsgqdrsssadkrkygdpdafrpapgtglvdmsrdrni prsptspgegfvnfdygwfgaqteadadktvwthgnhyhapngslgamhvyeskfrnwse gysdfdrgayvitfipkswntapdkvkqgwp