Chains and heterogens:
PDB Chain Sequences:
>1fn9A (A:) mevclpnghqvvdlinnafegrvsiysaqegwdktisaqpdmmvcggavvcmhclgvvgs lqrklkhlphhrcnqqirhqdyvdvqfadrvtahwkrgmlsfvaqmhemmndvspddldr vrteggslvelnwlqvdpnsmfrsihsswtdplqvvddldtkldqywtalnlmidssdli pnfmmrdpshafngvklggdarqtqfsrtfdsrsslewgvmvydyselehdpskgrayrk elvtpardfghfglshysrattpilgkmpavfsgmltgnckmypfikgtaklktvrklve avnhawgvekiryalgpggmtgwynrtmqqapivltpaaltmfpdtikfgdlnypvmigd pmilg
>1fn9B (B:) mevclpnghqvvdlinnafegrvsiysaqegwdktisaqpdmmvcggavvcmhclgvvgs lqrklkhlphhrcnqqirhqdyvdvqfadrvtahwkrgmlsfvaqmhemmndvspddldr vrteggslvelnwlqvdpnsmfrsihsswtdplqvvddldtkldqywtalnlmidssdli pnfmmrdpshafngvklggdarqtqfsrtfdsrsslewgvmvydyselehdpskgrayrk elvtpardfghfglshysrattpilgkmpavfsgmltgnckmypfikgtaklktvrklve avnhawgvekiryalgpggmtgwynrtmqqapivltpaaltmfpdtikfgdlnypvmigd pmilg