Chains and heterogens:
PDB Chain Sequences:
>1g7uA (A:) mkqkvvsigdinvandlpfvlfggmnvlesrdlamricehyvtvtqklgipyvfkasfdk anrssihsyrgpgleegmkifqelkqtfgvkiitdvhepsqaqpvadvvdviqlpaflar qtdlveamaktgavinvkkpqfvspgqmgnivdkfkeggnekvilcdrganfgydnlvvd mlgfsimkkvsgnspvifdvthalqcrdpfvaasggrraqvaelaragmavglaglfiea hpdpehakcdgpsalplaklepflkqmkaiddlvkgfeeldtsk