>4r18Y (Y:) observed residues (from ATOM records)
ttlafrfqggiivavdsratagnwvasqtvkkvieinpfllgtmaggaadcqfwetwlgs
qcrlhelrekerisvaaaskilsnlvyqykgaglsmgtmicgytrkegptiyyvdsdgtr
lkgdifcvgsgqtfaygvldsnykwdlsvedalylgkrsilaaahrdaysggsvnlyhvt
edgwiyhgnhdvgelfwkvkeeegsfnnvig