Chains and heterogens:
PDB Chain Sequences:
>1f6aA (A:) vpqkpkvslnppwnrifkgenvtltcngnnffevsstkwfhngslseetnsslnivnakf edsgeykcqhqqvaesepvylevfsdwlllqasaevvmegqplflrchgwrnwdvykviy ykdgealkywyenhaisitnaaaedsgtyyctgkvwqldyeseplnitvikap
>1f6aB (B:) pcdsnprgvsaylsrpspfdlfirksptitclvvdlapskgtvnltwsrasgkpvnhstr keekqrngtltvtstlpvgtrdwiegetyqcrvthphlpralmrsttktsgpraapevya fatpewpgsrdkrtlacliqnfmpedisvqwlhnevqlpdarhsttqprktkgsgffvfs rlevtraeweqkdeficravheaaspsqtvqravsvn
>1f6aD (D:) cdsnprgvsaylsrpspfdlfirksptitclvvdlapskgtvnltwsrasgkpvnhstrk eekqrngtltvtstlpvgtrdwiegetyqcrvthphlpralmrsttktsgpraapevyaf atpewpgsrdkrtlacliqnfmpedisvqwlhnevqlpdarhsttqprktkgsgffvfsr levtraeweqkdeficravheaaspsqtvqravsvn