Chains and heterogens:
PDB Chain Sequences:
>1fyfA (A:) rdhrkigkqldlyhmqeeapgmvfwhndgwtifrelevfvrsklkeyqyqevkgpfmmdr vlwektghwdnykdamfttssenreycikpmncpghvqifnqglksyrdlplrmaefgsc hrnepsgslhglmrvrgftqddahifcteeqirdevngcirlvydmystfgfekivvkls trpekrigsdemwdraeadlavaleennipfeyqlgegafygpkieftlydcldrawqcg tvqldfslpsrlsasyvgednerkvpvmihrailgsmerfigilteefagffptwlapvq vvimnitdsqseyvneltqklsnagirvkadlrnekigfkirehtlrrvpymlvcgdkev esgkvavrtrrgkdlgsmdvnevieklqqeirsrslkqlee
>1fyfB (B:) rdhrkigkqldlyhmqeeapgmvfwhndgwtifrelevfvrsklkeyqyqevkgpfmmdr vlwektghwdnykdamfttssenreycikpmncpghvqifnqglksyrdlplrmaefgsc hrnepsgslhglmrvrgftqddahifcteeqirdevngcirlvydmystfgfekivvkls trpekrigsdemwdraeadlavaleennipfeyqlgegafygpkieftlydcldrawqcg tvqldfslpsrlsasyvgednerkvpvmihrailgsmerfigilteefagffptwlapvq vvimnitdsqseyvneltqklsnagirvkadlrnekigfkirehtlrrvpymlvcgdkev esgkvavrtrrgkdlgsmdvnevieklqqeirsrslkqlee