>3s12B (B:) observed residues (from ATOM records)
ieggwqgmvdgwygyhhsneqgsgyaadkestqkaidgvtnkvnsiidkmntqfeavgre
fnnlerrienlnkkmedgfldvwtynaellvlmenertldfhdsnvknlydkvrlqlrdn
akelgngcfefyhkcdnecmesvkngtydypqyseear