Chains and heterogens:
PDB Chain Sequences:
>1kkcA (A:) gtspiqtpintmsqqytlpplpypydalqpyisqqimelhhkkhhqtyvnglnaaleaqk kaaeatdvpklvsvqqaikfnggghinhslfwknlapeksgggkidqapvlkaaieqrwg sfdkfkdafnttllgiqgsgwgwlvtdgpkgkldittthdqdpvtgaapvfgvdmwehay ylqylndkasyakgiwnvinwaeaenryiagdkgghpfmkl
>1kkcA (A:) qqytlpplpypydalqpyisqqimelhhkkhhqtyvnglnaaleaqkkaaeatdvpklvs vqqaikfnggghinhslfwknlapeksgggkidqapvlkaaieqrwgsfdkfkdafnttl lgiqgsgwgwlvtdgpkgkldittthdqdpvtgaapvfgvdmwehayylqylndkasyak giwnvinwaeaenryiagdk
>1kkcB (B:) gtspiqtpintmsqqytlpplpypydalqpyisqqimelhhkkhhqtyvnglnaaleaqk kaaeatdvpklvsvqqaikfnggghinhslfwknlapeksgggkidqapvlkaaieqrwg sfdkfkdafnttllgiqgsgwgwlvtdgpkgkldittthdqdpvtgaapvfgvdmwehay ylqylndkasyakgiwnvinwaeaenryiagdkgghpfmkl
>1kkcB (B:) qytlpplpypydalqpyisqqimelhhkkhhqtyvnglnaaleaqkkaaeatdvpklvsv qqaikfnggghinhslfwknlapeksgggkidqapvlkaaieqrwgsfdkfkdafnttll giqgsgwgwlvtdgpkgkldittthdqdpvtgaapvfgvdmwehayylqylndkasyakg iwnvinwaeaenryiagdk
>1kkcX (X:) gtspiqtpintmsqqytlpplpypydalqpyisqqimelhhkkhhqtyvnglnaaleaqk kaaeatdvpklvsvqqaikfnggghinhslfwknlapeksgggkidqapvlkaaieqrwg sfdkfkdafnttllgiqgsgwgwlvtdgpkgkldittthdqdpvtgaapvfgvdmwehay ylqylndkasyakgiwnvinwaeaenryiagdkgghpfmkl
>1kkcX (X:) qytlpplpypydalqpyisqqimelhhkkhhqtyvnglnaaleaqkkaaeatdvpklvsv qqaikfnggghinhslfwknlapeksgggkidqapvlkaaieqrwgsfdkfkdafnttll giqgsgwgwlvtdgpkgkldittthdqdpvtgaapvfgvdmwehayylqylndkasyakg iwnvinwaeaenryiagdkg
>1kkcY (Y:) gtspiqtpintmsqqytlpplpypydalqpyisqqimelhhkkhhqtyvnglnaaleaqk kaaeatdvpklvsvqqaikfnggghinhslfwknlapeksgggkidqapvlkaaieqrwg sfdkfkdafnttllgiqgsgwgwlvtdgpkgkldittthdqdpvtgaapvfgvdmwehay ylqylndkasyakgiwnvinwaeaenryiagdkgghpfmkl
>1kkcY (Y:) qqytlpplpypydalqpyisqqimelhhkkhhqtyvnglnaaleaqkkaaeatdvpklvs vqqaikfnggghinhslfwknlapeksgggkidqapvlkaaieqrwgsfdkfkdafnttl lgiqgsgwgwlvtdgpkgkldittthdqdpvtgaapvfgvdmwehayylqylndkasyak giwnvinwaeaenryiagdk