Chains and heterogens:
PDB Chain Sequences:
>2r1oA (A:) gdlintvrgpipvseagftlthehicgssagflrawpeffgsrkalaekavrglrharaa gvqtivdvstfdigrdvrllaevsraadvhivaatglwfdpplsmrmrsveeltqfflre iqhgiedtgiragiikvattgkatpfqelvlkaaaraslatgvpvtthtsasqrdgeqqa aifeseglspsrvcighsddtddlsyltglaargylvgldrmpysaiglegnasalalfg trswqtrallikalidrgykdrilvshdwlfgfssyvtnimdvmdrinpdgmafvplrvi pflrekgvppetlagvtvanparflspt