Chains and heterogens:
PDB Chain Sequences:
>1iyiA (A:) pnykltyfnmrgraeiiryifayldiqyedhrieqadwpeikstlpfgkipilevdgltl hqslaiaryltkntdlagntemeqchvdaivdtlddfmscfpwaekkqdvkeqmfnellt ynaphlmqdldtylggrewligmsvtwadfyweicsttllvfkpdlldnhprlvtlrkkv qaipavanwikrrpqtkl
>1iyiB (B:) pnykltyfnmrgraeiiryifayldiqyedhrieqadwpeikstlpfgkipilevdgltl hqslaiaryltkntdlagntemeqchvdaivdtlddfmscfpwaekkqdvkeqmfnellt ynaphlmqdldtylggrewligmsvtwadfyweicsttllvfkpdlldnhprlvtlrkkv qaipavanwikrrpqtkl
>1iyiC (C:) pnykltyfnmrgraeiiryifayldiqyedhrieqadwpeikstlpfgkipilevdgltl hqslaiaryltkntdlagntemeqchvdaivdtlddfmscfpwaekkqdvkeqmfnellt ynaphlmqdldtylggrewligmsvtwadfyweicsttllvfkpdlldnhprlvtlrkkv qaipavanwikrrpqtkl
>1iyiD (D:) pnykltyfnmrgraeiiryifayldiqyedhrieqadwpeikstlpfgkipilevdgltl hqslaiaryltkntdlagntemeqchvdaivdtlddfmscfpwaekkqdvkeqmfnellt ynaphlmqdldtylggrewligmsvtwadfyweicsttllvfkpdlldnhprlvtlrkkv qaipavanwikrrpqtkl