Chains and heterogens:
PDB Chain Sequences:
>1qi4A (A:) dqagkspnavryhggdeiilqgfhwnvvreapndwynilrqqaatiaadgfsaiwmpvpw rdfsswsdgsksgggegyfwhdfnkngrygsdaqlrqaasalggagvkvlydvvpnhmnr gypdkeinlpagqgfwrndcadpgnypndcddgdrfiggdadlntghpqvygmfrdeftn lrsqygaggfrfdfvrgyapervnswmtdsadnsfcvgglwkgpseypnwdwrntaswqq iikdwsdrakcpvfdfalkermqngsiadwkhglngnpdprwrevavtfvdnhdtgyspg qnggqhhwalqdglirqayayiltspgtpvvywdhmydwgygdfirqliqvrraagvrad saisfhsgysglvatvsgsqqtlvvalnsdlgnpgqvasgsfseavnasngqvrvwrs