>1cexA (A:) observed residues (from ATOM records)
rttrddlingnsascadvifiyargstetgnlgtlgpsiasnlesafgkdgvwiqgvgga
yratlgdnalprgtssaairemlglfqqantkcpdatliaggysqgaalaaasiedldsa
irdkiagtvlfgytknlqnrgripnypadrtkvfcntgdlvctgslivaaphlaygpdar
gpapefliekvravrgs