>4q2fB (B:) observed residues (from ATOM records)
cglvasnlnlkpgeclrvrgevapdaksfvlnlgkdsnnlclhfnprfnahgdantivcn
skdggawgteqreavfpfqpgsvaevcitfdqanltvklpdgyefkfpnrlnleainyma
adgdfkikcvafd