Chains and heterogens:
PDB Chain Sequences:
>1ktlA (A:) gshslkyfhtsvsrpgrgeprfisvgyvddtqfvrfdndaasprmvprapwmeqegseyw dretrsardtaqifrvnlrtlrgyynqseagshtlqwmhgcelgpdgrflrgyeqfaydg kdyltlnedlrswtavdtaaqiseqksndaseaehqrayledtcvewlhkylekgketll hleppkthvthhpisdheatlrcwalgfypaeitltwqqdgeghtqdtelvetrpagdgt fqkwaavvvpsgeeqaytchvqheglpepvtlrw
>1ktlB (B:) miqrtpkiqvysrhpaengksnflncyvsgfhpsdievdllkngeriekvehsdlsfskd wsfyllyyteftptekdeyacrvnhvtlsqpkivkwdrdm
>1ktlC (C:) gshslkyfhtsvsrpgrgeprfisvgyvddtqfvrfdndaasprmvprapwmeqegseyw dretrsardtaqifrvnlrtlrgyynqseagshtlqwmhgcelgpdgrflrgyeqfaydg kdyltlnedlrswtavdtaaqiseqksndaseaehqrayledtcvewlhkylekgketll hleppkthvthhpisdheatlrcwalgfypaeitltwqqdgeghtqdtelvetrpagdgt fqkwaavvvpsgeeqaytchvqheglpepvtlrw
>1ktlD (D:) miqrtpkiqvysrhpaengksnflncyvsgfhpsdievdllkngeriekvehsdlsfskd wsfyllyyteftptekdeyacrvnhvtlsqpkivkwdrdm