Chains and heterogens:
PDB Chain Sequences:
>3d91A (A:) ltlgnttssviltnymdtqyygeigigtppqtfkvvfdtgssnvwvpsskcsrlytacvy hklfdasdsssykhngteltlrystgtvsgflsqdiitvggitvtqmfgevtempalpfm laefdgvvgmgfieqaigrvtpifdniisqgvlkedvfsfyynrdsensqslggqivlgg sdpqhyegnfhyinliktgvwqiqmkgvsvgsstllcedgclalvdtgasyisgstssie klmealgakkrlfdyvvkcnegptlpdisfhlggkeytltsadyvfqesysskklctlai hamdippptgptwalgatfirkfytefdrrnnrigfalarh
>3d91A (A:) gnttssviltnymdtqyygeigigtppqtfkvvfdtgssnvwvpsskcsrlytacvyhkl fdasdsssykhngteltlrystgtvsgflsqdiitvggitvtqmfgevtempalpfmlae fdgvvgmgfieqaigrvtpifdniisqgvlkedvfsfyynrdsslggqivlggsdpqhye gnfhyinliktgvwqiqmkgvsvgsstllcedgclalvdtgasyisgstssieklmealg akkrlfdyvvkcnegptlpdisfhlggkeytltsadyvfqesysskklctlaihamdipp ptgptwalgatfirkfytefdrrnnrigfalarh
>3d91B (B:) ltlgnttssviltnymdtqyygeigigtppqtfkvvfdtgssnvwvpsskcsrlytacvy hklfdasdsssykhngteltlrystgtvsgflsqdiitvggitvtqmfgevtempalpfm laefdgvvgmgfieqaigrvtpifdniisqgvlkedvfsfyynrdsensqslggqivlgg sdpqhyegnfhyinliktgvwqiqmkgvsvgsstllcedgclalvdtgasyisgstssie klmealgakkrlfdyvvkcnegptlpdisfhlggkeytltsadyvfqesysskklctlai hamdippptgptwalgatfirkfytefdrrnnrigfalarh
>3d91B (B:) ltlgnttssviltnymdtqyygeigigtppqtfkvvfdtgssnvwvpsskcsrlytacvy hklfdasdsssykhngteltlrystgtvsgflsqdiitvggitvtqmfgevtempalpfm laefdgvvgmgfieqaigrvtpifdniisqgvlkedvfsfyynrdsslggqivlggsdpq hyegnfhyinliktgvwqiqmkgvsvgsstllcedgclalvdtgasyisgstssieklme algakkrlfdyvvkcnegptlpdisfhlggkeytltsadyvfqesysskklctlaihamd ippptgptwalgatfirkfytefdrrnnrigfalarh