Chains and heterogens:
PDB Chain Sequences:
>6iwkA (A:) dqagkspagvryhggdeiilqgfhwnvvreapndwynilrqqastiaadgfsaiwmpvpw rdfsswsdggksgggegyfwhdfnkngrygsdaqlrqaagalggagvkvlydvvpnhmnr gypdkeinlpagqgfwrndcadpgnypndcddgdrfiggesdlntghpqiygmfrdelan lrsgygaggfrfdfvrgyapervdswmsdsadssfcvgelwkgpseypswdwrntaswqq iikdwsdrakcpvfdfalkermqngsvadwkhglngnpdprwrevavtfvdnhdtgyspg qnggqhhwalqdglirqayayiltspgtpvvywshmydwgygdfirqliqvrrtagvrad saisfhsgysglvatvsgsqqtlvvalnsdlanpgqvasgsfseavnasngqvrvwrs
>6iwkA (A:) dqagkspagvryhggdeiilqgfhwnvvreapndwynilrqqastiaadgfsaiwmpvpw rdfsswsksgggegyfwhdfnkngrygsdaqlrqaagalggagvkvlydvvpnhmnrgyp dkeinlpagqgfwrndcadpgnypndcddgdrfiggesdlntghpqiygmfrdelanlrs gygaggfrfdfvrgyapervdswmsdsadssfcvgelwkgpseypswdwrntaswqqiik dwsdrakcpvfdfalkermqngsvadwkhglngnpdprwrevavtfvdnhdtgyspgqng gqhhwalqdglirqayayiltspgtpvvywshmydwgygdfirqliqvrrtagvradsai sfhsgysglvatvsgsqqtlvvalnsdlanpgqvasgsfseavnasngqvrvwrs