Chains and heterogens:
PDB Chain Sequences:
>1xzkA (A:) lptsnpaqelearqlerttrddlingnsascadvifiyargstetgnlgtlgpsiasnle safgkdgvwiqgvggayratlgdnalprgtssaairemlglfqqantkcpdatliaggys qgaalaaasiedldsairdkiagtvlfgytknlqnrgripnypadrtkvfcntgdlvctg slivaaphlaygpdargpapefliekvravrgsa
>1xzkA (A:) rttrddlingnsascadvifiyargstetgnlgtlgpsiasnlesafgkdgvwiqgvgga yratlgdnalprgtssaairemlglfqqantkcpdatliaggysqgaalaaasiedldsa irdkiagtvlfgytknlqnrgripnypadrtkvfcntgdlvctgslivaaphlaygpdar gpapefliekvravrgs
>1xzkB (B:) lptsnpaqelearqlerttrddlingnsascadvifiyargstetgnlgtlgpsiasnle safgkdgvwiqgvggayratlgdnalprgtssaairemlglfqqantkcpdatliaggys qgaalaaasiedldsairdkiagtvlfgytknlqnrgripnypadrtkvfcntgdlvctg slivaaphlaygpdargpapefliekvravrgsa
>1xzkB (B:) rttrddlingnsascadvifiyargstetgnlgtlgpsiasnlesafgkdgvwiqgvgga yratlgdnalprgtssaairemlglfqqantkcpdatliaggysqgaalaaasiedldsa irdkiagtvlfgytknlqnrgripnypadrtkvfcntgdlvctgslivaaphlaygpdar gpapefliekvravrgs