Chains and heterogens:
PDB Chain Sequences:
>1bf6A (A:) sfdptgytlahehlhidlsgfknnvdcrldqyaficqemndlmtrgvrnviemtnrymgr naqfmldvmretginvvactgyyqdaffpehvatrsvqelaqemvdeieqgidgtelkag iiaeigtsegkitpleekvfiaaalahnqtgrpisthtsfstmgleqlallqahgvdlsr vtvghcdlkdnldnilkmidlgayvqfdtigknsyypdekriamlhalrdrgllnrvmls mditrrshlkanggygydyllttfipqlrqsgfsqadvdvmlrenpsqffq
>1bf6B (B:) sfdptgytlahehlhidlsgfknnvdcrldqyaficqemndlmtrgvrnviemtnrymgr naqfmldvmretginvvactgyyqdaffpehvatrsvqelaqemvdeieqgidgtelkag iiaeigtsegkitpleekvfiaaalahnqtgrpisthtsfstmgleqlallqahgvdlsr vtvghcdlkdnldnilkmidlgayvqfdtigknsyypdekriamlhalrdrgllnrvmls mditrrshlkanggygydyllttfipqlrqsgfsqadvdvmlrenpsqffq