Chains and heterogens:
PDB Chain Sequences:
>1cwnA (A:) aascvllhtgqkmpliglgtwksepgqvkaaikyaltvgyrhidcaaiygneleigealt etvgpgkavpreelfvtsklwntkhhpedvepalrktladlqleyldlylmhwpyaferg dnpfpknadgtirydathykdtwkalealvakglvralglsnfssrqiddvlsvasvrpa vlqvechpylaqneliahcqarglevtaysplgssdrawrdpnepvlleepvvqalaeky nrspaqillrwqvqrkvicipksvtpsripqniqvfdftfspeemkqldalnknlrfivp mltvdgkrvprdaghplypfndpy