Chains and heterogens:
PDB Chain Sequences:
>1kk2A (A:) gekrksrqaevnigmvghvdhgkttltkaltgvwtdthseelrrgitikigfadaeirrc pncgrystspvcpycghetefvrrvsfidapghealmttmlagaslmdgailviaanepc prpqtrehlmalqiigqkniiiaqnkielvdkekalenyrqikefiegtvaenapiipis alhganidvlvkaiedfiptpkrdpnkppkmlvlrsfdvnkpgtppeklvggvldgsivq gklkvgdeieirpgvpyeehgrikyepitteivslqaggqfveeaypgglvgvgtkldpy ltkgdlmagnvvgkpgklppvwdslrlevhllervvgteqelkvepikrkevlllnvgta rtmglvtglgkdeievklqipvcaepgdrvaisrqigsrwrligygiike
>1kk2A (A:) srqaevnigmvghvdhgkttltkaltgvwtdseelrrgitikigfadaeirrcpncgrys tspvcpycghetefvrrvsfidapghealmttmlagaslmdgailviaanepcprpqtre hlmalqiigqkniiiaqnkielvdkekalenyrqikefiegtvaenapiipisalhgani dvlvkaiedfiptpkrdpnkppkmlvlrsfdvnkpglvggvldgsivqgklkvgdeieir pgvpyeehgrikyepitteivslqaggqfveeaypgglvgvgtkldpyltkgdlmagnvv gkpgklppvwdslrlevhllervveqelkvepikrkevlllnvgtartmglvtglgkdei evklqipvcaepgdrvaisrqigsrwrligygiike