Chains and heterogens:
PDB Chain Sequences:
>1kk3A (A:) gekrksrqaevnigmvghvdhgkttltkaltgvwtdthseelrrgitikigfadaeirrc pncgrystspvcpycghetefvrrvsfidapghealmttmlagaslmdgailviaanepc prpqtrehlmalqiigqkniiiaqnkielvdkekalenyrqikefiegtvaenapiipis alhganidvlvkaiedfiptpkrdpnkppkmlvlrsfdvnkpgtppeklvggvlggsivq gklkvgdeieirpgvpyeehgrikyepitteivslqaggqfveeaypgglvgvgtkldpy ltkgdlmagnvvgkpgklppvwdslrlevhllervvgteqelkvepikrkevlllnvgta rtmglvtglgkdeievklqipvcaepgdrvaisrqigsrwrligygiike
>1kk3A (A:) srqaevnigmvghvdhgkttltkaltgvwtdseelrrgitikigfadaeirrcpncgrys tspvcpycghetefvrrvsfidapghealmttmlagaslmdgailviaanepcprpqtre hlmalqiigqkniiiaqnkielvdkekalenyrqikefiegtvaenapiipisalhgani dvlvkaiedfiptpkrdpnkppkmlvlrsfdvnkpgeklvggvlggsivqgklkvgdeie irpgvpyeehgrikyepitteivslqaggqfveeaypgglvgvgtkldpyltkgdlmagn vvgkpgklppvwdslrlevhllervveqelkvepikrkevlllnvgtartmglvtglgkd eievklqipvcaepgdrvaisrqigsrwrligygiike