Chains and heterogens:
PDB Chain Sequences:
>1p57A (A:) sdqeplypvqvssadarlmvfdktegtwrllcssrsnarvaglsceemgflralthseld vrtagaagtsgffcvdegrlphtqrllevisvcdcprgrflaaicqdcgrrklp
>1p57A (A:) plypvqvssadarlmvfdktegtwrllcssrsnarvaglsceemgflralthseldvrta gaagtsgffcvdegrlphtqrllevisvcdcprgrflaaicqdcgrrklp
>1p57B (B:) ivggrdtslgrwpwqvslrydgahlcggsllsgdwvltaahcfpernrvlsrwrvfagav aqasphglqlgvqavvyhggylpfrdpnseensndialvhlssplplteyiqpvclpaag qalvdgkictvtgwgntqyygqqagvlqearvpiisndvcngadfygnqikpkmfcagyp eggidacqgdsggpfvcedsisrtprwrlcgivswgtgcalaqkpgvytkvsdfrewifq aikthseasgmvtql
>1p57B (B:) ivggrdtslgrwpwqvslrydgahlcggsllsgdwvltaahcfpernrvlsrwrvfagav aqasphglqlgvqavvyhggylpfnsndialvhlssplplteyiqpvclpaagqalvdgk ictvtgwgntqyygqqagvlqearvpiisndvcngadfygnqikpkmfcagypeggidac qgdsggpfvcedsisrtprwrlcgivswgtgcalaqkpgvytkvsdfrewifqaikthse asgmvtq