Chains and heterogens:
PDB Chain Sequences:
>4rk9A (A:) smagcsgknagksgdvtltmfstmtndsekntlrsiaddfekenegikidisfpgpdyen mlrvkmaandmpdlfdthgwakirygeytadlkdmdwvkhldpnldpilkdekgkvyayp fnqakdgivynagllkkyglkppqtldelmhaletikeksngsvipfwfagsdkgalaqf ydqlatpllitddrrnekkalengtfdwsdytllaetfkemqekqlinkdiltakpsqlv elmaqekigftlsvtsigpdtrevnpdiqlgvmptpavyegdkpswiggerhtvavwkds ehleeakrfiefaaqpkyvkkiaeatsfpqaltnteaenyyskfydqyeeikiepyfdrv ylpsgmwdvmgttgqellagtltpkqvsekmkqeysrlqeq
>4rk9A (A:) vtltmfstmtndsekntlrsiaddfekenegikidisfpgpdyenmlrvkmaandmpdlf dthgwakirygeytadlkdmdwvkhldpnldpilkdekgkvyaypfnqakdgivynagll kkyglkppqtldelmhaletikeksngsvipfwfagsdkgalaqfydqlatpllitddrr nekkalengtfdwsdytllaetfkemqekqlinkdiltakpsqlvelmaqekigftlsvt sigpdtrevnpdiqlgvmptpavyegdkpswiggerhtvavwkdsehleeakrfiefaaq pkyvkkiaeatsfpqaltnteaenyyskfydqyeeikiepyfdrvylpsgmwdvmgttgq ellagtltpkqvsekmkqeysrlq
>4rk9B (B:) smagcsgknagksgdvtltmfstmtndsekntlrsiaddfekenegikidisfpgpdyen mlrvkmaandmpdlfdthgwakirygeytadlkdmdwvkhldpnldpilkdekgkvyayp fnqakdgivynagllkkyglkppqtldelmhaletikeksngsvipfwfagsdkgalaqf ydqlatpllitddrrnekkalengtfdwsdytllaetfkemqekqlinkdiltakpsqlv elmaqekigftlsvtsigpdtrevnpdiqlgvmptpavyegdkpswiggerhtvavwkds ehleeakrfiefaaqpkyvkkiaeatsfpqaltnteaenyyskfydqyeeikiepyfdrv ylpsgmwdvmgttgqellagtltpkqvsekmkqeysrlqeq
>4rk9B (B:) vtltmfstmtndsekntlrsiaddfekenegikidisfpgpdyenmlrvkmaandmpdlf dthgwakirygeytadlkdmdwvkhldpnldpilkdekgkvyaypfnqakdgivynagll kkyglkppqtldelmhaletikeksngsvipfwfagsdkgalaqfydqlatpllitddrr nekkalengtfdwsdytllaetfkemqekqlinkdiltakpsqlvelmaqekigftlsvt sigpdtrevnpdiqlgvmptpavyegdkpswiggerhtvavwkdsehleeakrfiefaaq pkyvkkiaeatsfpqaltnteaenyyskfydqyeeikiepyfdrvylpsgmwdvmgttgq ellagtltpkqvsekmkqeysrlq