>4aq3A (A:) observed residues (from ATOM records)
ydnreivmkyihyklsqrgyewdvvhlalrqagddfsrryrgdfaemssqlhltpftarg
rfatvveelfrdgvnwgrivaffefggvmcvesvnremsplvdnialwmteylnrhlhtw
iqdnggwdafvelyg