Chains and heterogens:
PDB Chain Sequences:
>1r76A (A:) avigmneaasaltpsrvsslpdtqraawqeylarseaqlsrdkaslaaelapgqplpppp aegkgadtmpldkpaawytskaarhvadvivsfqtpaggwgknqprdgalrlpgqhytge nvakvksgsndldaardrdwhyvgtidndatvteirflaqvvsqlapeeaapyrdaalkg ieyllasqfpnggwpqvwpleggyhdaitynddalvhvaellsdiaagrdgfgfvppair traleatnaaihcivetqvvqdgkrlgwgqqhdaltlrptsarnfepaalsstesarill flmeieapsdavkqairggvawlntsvirdrawvksdqgyqlvteqgakplwsrfysldg nkpvfgdrdktihddvmgisqerrtgyawyttspqkalsaftkwekrs
>1r76A (A:) avigmneaasaltpsrvsslpdtqraawqeylarseaqlsrdkaslaaelapgqplpppp aegkgadtmpldkpaawytskaarhvadvivsfqtpaggwgknqprdgalrlpgqhytge nvakvkrdrdwhyvgtidndatvteirflaqvvsqlapeeaapyrdaalkgieyllasqf pnggwpqvwpleggyhdaitynddalvhvaellsdiaagrdgfgfvppairtraleatna aihcivetqvvqdgkrlgwgqqhdaltlrptsarnfepaalsstesarillflmeieaps davkqairggvawlntsvirdqgakplwsrfysldgnkpvfgdrdktihddvmgisqerr tgyawyttspqkalsaftkwekrs