>4xfuB (B:) observed residues (from ATOM records)
yfgklesklsvirnlndqvlfidqgnrplfedmtdaprtifiismykdsqrrgmavtisv
acaaastlscenkiisfkemnppdnikdtksdiiffqrrvpghdnkmqfesssyegyfla
cekerdlfklilkkedelgdrsimftvqne