Chains and heterogens:
PDB Chain Sequences:
>2visA (A:) qavvtqesalttspgetvtltcrsstgavttsnyanwvqekpdhlftgliggtnnrapgv parfsgsligdkaaltitgaqtedeaiyfcalwysnhwvfgggtkltvlgqpksspsvtl fppsseeletnkatlvctitdfypgvvtvdwkvdgtpvtqgmettqpskqsnnkymassy ltltarawerhssyscqvtheghtveksls
>2visB (B:) qvqlkesgpglvapsqslsitctvsgfllisngvhwvrqppgkglewlgviwaggntnyn salmsrvsiskdnsksqvflkmkslqtddtamyycardfydydvfyyamdywgqgtsvtv ssakttppsvyplapgsaaqtnsmvtlgclvkgyfpepvtvtwnsgslssgvhtfpavlq sdlytlsssvtvpsstwpsetvtcnvahpasstkvdkkivp
>2visC (C:) vqssstgkicnnphrildgidctlidallgdphcdvfqnetwdlfverskafsncypydv pdyaslrslvassgtlefitegftwtgviqnggsnackrgpgsgffsrlnwltksgstyp vlnvtmpnndnfdklyiwgihhpstnqeqtslyvqasgrvtvstrrsqqtiipnigsrpw vrglssrisiywtivkpgdvlvinsngnliaprgyfkmrtgkssimrsdapidtciseci tpngsipndkpfqnvnkitygacpkyv