Chains and heterogens:
PDB Chain Sequences:
>1bi3A (A:) lvdttemylrtiyeleeegvtplrariaerleqsgptvsqtvarmerdglvvvasdrslq mtptgrtlatavmrkhrlaerlltdiigldinkvhdeacrwehvmsdeverrlvkvlkdv srspfgnpipgldelgvgnsdaaapgtrvidaatsmprkvrivqineifqvetdqftqll dadirvgseveivdrdghitlshngkdvellddlahtiriee
>1bi3A (A:) lvdttemylrtiyeleeegvtplrariaerleqsgptvsqtvarmerdglvvvasdrslq mtptgrtlatavmrkhrlaerlltdiigldinkvhdeacrwehvmsdeverrlvkvlkdv srspfgnpipgldelgvpgtrvidaatsmprkvrivqineifqvetdqftqlldadirvg seveivdhitlshngkdvellddlahtiriee
>1bi3B (B:) lvdttemylrtiyeleeegvtplrariaerleqsgptvsqtvarmerdglvvvasdrslq mtptgrtlatavmrkhrlaerlltdiigldinkvhdeacrwehvmsdeverrlvkvlkdv srspfgnpipgldelgv