Chains and heterogens:
PDB Chain Sequences:
>1cuh_ (-) rttrddlingnsascadvifiyargstetgnlgtlgpsiasnlesafgkdgvwiqgvgga yratlgdnalprgtssaairemlglfqqantkcpdatliaggysqgaalaaasiedldsa irdkiagtvlfgytknlqnrgripnypadrtkvfcntgdlvctgslivaaphlaygpdae gpapefliekvravrgs