>7a6aS (S:) observed residues (from ATOM records)
stsqvrqnyhqdseaainrqinlelyasyvylsmsyyfdrddvalknfakyflhqsheer
ehaeklmklqnqrggriflqdiqkpdcddwesglnamecalhleknvnqsllelhklatd
kndphlcdfiethylneqvkaikelgdhvtnlrkmgapesglaeylfdkhtlg