Chains and heterogens:
PDB Chain Sequences:
>1kprA (A:) gshslkyfhtsvsrpgrgeprfisvgyvddtqfvrfdndaasprmvprapwmeqegseyw dretrsardtaqifrvnlrtlrgyynqseagshtlqwmhgcelgpdgrflrgyeqfaydg kdyltlnedlrswtavdtaaqiseqksndaseaehqrayledtcvewlhkylekgketll hleppkthvthhpisdheatlrcwalgfypaeitltwqqdgeghtqdtelvetrpagdgt fqkwaavvvpsgeeqaytchvqheglpepvtlrw
>1kprB (B:) miqrtpkiqvysrhpaengksnflncyvsgfhpsdievdllkngeriekvehsdlsfskd wsfyllyyteftptekdeyacrvnhvtlsqpkivkwdrdm
>1kprC (C:) gshslkyfhtsvsrpgrgeprfisvgyvddtqfvrfdndaasprmvprapwmeqegseyw dretrsardtaqifrvnlrtlrgyynqseagshtlqwmhgcelgpdgrflrgyeqfaydg kdyltlnedlrswtavdtaaqiseqksndaseaehqrayledtcvewlhkylekgketll hleppkthvthhpisdheatlrcwalgfypaeitltwqqdgeghtqdtelvetrpagdgt fqkwaavvvpsgeeqaytchvqheglpepvtlrw
>1kprD (D:) miqrtpkiqvysrhpaengksnflncyvsgfhpsdievdllkngeriekvehsdlsfskd wsfyllyyteftptekdeyacrvnhvtlsqpkivkwdrdm