Chains and heterogens:
PDB Chain Sequences:
>2xa4A (A:) afedrdptqfeerhlkflqqlgkgnfgsvemcrydplqdntgevvavkklqhsteehlrd fereieilkslqhdnivkykgvcysagrrnlklimeylpygslrdylqahaeridhikll qytsqickgmeylgtkryihrdlatrnilvenenrvkigdfgltkvlpqdkeyykvkepg espifwyapeslteskfsvasdvwsfgvvlyelftyieksksppaefmrmigndkqgqmi vfhliellknngrlprpdgcpdeiymimtecwnnnvnqrpsfrdlalrvdqirdnmag
>2xa4A (A:) qfeerhlkflqqlgkfgsvemcrydplqdntgevvavkklqhsteehlrdfereieilks lqhdnivkykgvcysnlklimeylpygslrdylqahaeridhikllqytsqickgmeylg tkryihrdlatrnilvenenrvkigdfgltkvlpqdkeyykvespifwyapeslteskfs vasdvwsfgvvlyelftyieksksppaefmrmigndkqgqmivfhliellknngrlprpd gcpdeiymimtecwnnnvnqrpsfrdlalrvdqirdnm
>2xa4B (B:) afedrdptqfeerhlkflqqlgkgnfgsvemcrydplqdntgevvavkklqhsteehlrd fereieilkslqhdnivkykgvcysagrrnlklimeylpygslrdylqahaeridhikll qytsqickgmeylgtkryihrdlatrnilvenenrvkigdfgltkvlpqdkeyykvkepg espifwyapeslteskfsvasdvwsfgvvlyelftyieksksppaefmrmigndkqgqmi vfhliellknngrlprpdgcpdeiymimtecwnnnvnqrpsfrdlalrvdqirdnmag
>2xa4B (B:) qfeerhlkflqqlgkgnfgsvemcrydplqdntgevvavkklqhlrdfereieilkslqh dnivkykgvcnlklimeylpygslrdylqahaeridhikllqytsqickgmeylgtkryi hrdlatrnilvenenrvkigdfgltkvlpqdkeyykvkegespifwyapeslteskfsva sdvwsfgvvlyelftyieksksppaefmrmigndkqgqmivfhliellknngrlprpdgc pdeiymimtecwnnnvnqrpsfrdlalrvdqirdnma