Chains and heterogens:
PDB Chain Sequences:
>1ffd_ (-) rttrddlingnsascrdvifiyargstetgnlgtlgpsiasnlesafgkdgvwiqgvgga yratlgdwalprgtssaairemlglfqqantkcpdatliaggysqgaalaaasiedldsa irdkiagtvlfgytknlqnrgripnypadrtkvfcntgdlvctgslivaaphlaygpdar gpapefliekvravrgs