Chains and heterogens:
PDB Chain Sequences:
>1btmA (A:) rkpiiagnwkmhktlaeavqfvedvkghvppadevisvvcapflfldrlvqaadgtdlki gaqtmhfadqgaytgevspvmlkdlgvtyvilghserrqmfaetdetvnkkvlaaftrgl ipiiccgesleereagqtnavvasqvekalagltpeqvkqaviayepiwaigtgksstpe dansvcghirsvvsrlfgpeaaeairiqyggsvkpdnirdflaqqqidgplvggaslepa sflqlveagrhe
>1btmA (A:) rkpiiagnwkmhktlaeavqfvedvkghvppadevisvvcapflfldrlvqaadgtdlki gaqtmhfadqgaytgevspvmlkdlgvtyvilghserrqmfaetdetvnkkvlaaftrgl ipiiccgesleereagqtnavvasqvekalagltpeqvkqaviayepiwaigtgksstpe dansvcghirsvvsrlfgpeaaeairiqyggsvkpdnirdflaqqqidgplvggaslepa sflqlveagrh
>1btmB (B:) rkpiiagnwkmhktlaeavqfvedvkghvppadevisvvcapflfldrlvqaadgtdlki gaqtmhfadqgaytgevspvmlkdlgvtyvilghserrqmfaetdetvnkkvlaaftrgl ipiiccgesleereagqtnavvasqvekalagltpeqvkqaviayepiwaigtgksstpe dansvcghirsvvsrlfgpeaaeairiqyggsvkpdnirdflaqqqidgplvggaslepa sflqlveagrhe
>1btmB (B:) rkpiiagnwkmhktlaeavqfvedvkghvppadevisvvcapflfldrlvqaadgtdlki gaqtmhfadqgaytgevspvmlkdlgvtyvilghserrqmfaetdetvnkkvlaaftrgl ipiiccgesleereagqtnavvasqvekalagltpeqvkqaviayepiwaigtgksstpe dansvcghirsvvsrlfgpeaaeairiqyggsvkpdnirdflaqqqidgplvggaslepa sflqlveagrh