Chains and heterogens:
PDB Chain Sequences:
>4r51A (A:) mgytvavvgatgavgaqmikmleestlpidkirylasarsagkslkfkdqditieettet afegvdialfsagsstsakyapyavkagvvvvdntsyfrqnpdvplvvpevnahaldahn giiacpncstiqmmvalepvrqkwgldriivstyqavsgagmgailetqrelrevlndgv kpcdlhaeilpsggdkkhypiafnalpqidvftdndytyeemkmtketkkimeddsiavs atcvripvlsahsesvyietkevapieevkaaiaafpgavleddvahqiypqainavgsr dtfvgrirkdldaekgihmwvvsdnllkgaawnsvqiaetlherglvrptaelkfelkle hhhhhh
>4r51A (A:) gytvavvgatgavgaqmikmleestlpidkirylasarsagkslkfkdqditieetteta fegvdialfsagsstsakyapyavkagvvvvdntsyfrqnpdvplvvpevnahaldahng iiacpncstiqmmvalepvrqkwgldriivstyqavsgagmgailetqrelrevlndgvk pcdlhaeilpsggdkkhypiafnalpqidvftdndytyeemkmtketkkimeddsiavsa tcvripvlsahsesvyietkevapieevkaaiaafpgavleddvahqiypqainavgsrd tfvgrirkdldaekgihmwvvsdnllkgaawnsvqiaetlherglvrptaelkfelkleh
>4r51B (B:) mgytvavvgatgavgaqmikmleestlpidkirylasarsagkslkfkdqditieettet afegvdialfsagsstsakyapyavkagvvvvdntsyfrqnpdvplvvpevnahaldahn giiacpncstiqmmvalepvrqkwgldriivstyqavsgagmgailetqrelrevlndgv kpcdlhaeilpsggdkkhypiafnalpqidvftdndytyeemkmtketkkimeddsiavs atcvripvlsahsesvyietkevapieevkaaiaafpgavleddvahqiypqainavgsr dtfvgrirkdldaekgihmwvvsdnllkgaawnsvqiaetlherglvrptaelkfelkle hhhhhh
>4r51B (B:) gytvavvgatgavgaqmikmleestlpidkirylasarsagkslkfkdqditieetteta fegvdialfsagsstsakyapyavkagvvvvdntsyfrqnpdvplvvpevnahaldahng iiacpncstiqmmvalepvrqkwgldriivstyqavsgagmgailetqrelrevlndgvk pcdlhaeilpsggdkkhypiafnalpqidvftdndytyeemkmtketkkimeddsiavsa tcvripvlsahsesvyietkevapieevkaaiaafpgavleddvahqiypqainavgsrd tfvgrirkdldaekgihmwvvsdnllkgaawnsvqiaetlherglvr