>1xcfB (B:) observed residues (from ATOM records)
meryeslfaqlkerkegafvpfvtlgdlgieqslkiidtlieagadalelgipfvtpaqc
femlaiirekhptipigllmyanlvfnkgidefyarcekvgvdsvlvadvpveesapfrq
aalrhnvapificppnadddllrqiasygrgftyllsraaalplnhlvaklkeynaappl
qgfgisapdqvkaaidagaagaisgsaivkiieqhinepekmlaalkvfvqpmkaatr