Chains and heterogens:
PDB Chain Sequences:
>1ppmE (E:) aasgvatntptandeeyitpvtiggttlnlnfdtgsadlwvfstelpasqqsghsvynps atgkelsgytwsisygdgssasgnvftdsvtvggvtahgqavqaaqqisaqfqqdtnndg llglafssintvqpqsqttffdtvksslaqplfavalkhqqpgvydfgfidsskytgslt ytgvdnsqgfwsfnvdsytagsqsgdgfsgiadtgttllllddsvvsqyysqvsgaqqds naggyvfdcstnlpdfsvsisgytatvpgslinygpsgdgstclggiqsnsgigfsifgd iflksqyvvfdsdgpqlgfapqa