Chains and heterogens:
PDB Chain Sequences:
>1drw_ (-) hdanirvaiagaggrmgrqliqaalalegvqlgaaleregssllgsdagelagagktgvt vqssldavkddfdvfidftrpegtlnhlafcrqhgkgmvigttgfdeagkqairdaaadi aivfaanfsvgvnvmlkllekaakvmgdytdieiieahhrhkvdapsgtalamgeaiaha ldkdlkdcavysreghtgervpgtigfatvragdivgehtamfadigerleithkassrm tfangavrsalwlsgkesglfdmrdvldlnnl