>4nrkF (F:) observed residues (from ATOM records)
gffgaiagfleggwegmiagwhgytshgahgvavaadlkstqeainkitknlnslselev
knlqrlsgamnelhdeileldekvddlradtissqielavllsnegiinsedehllaler
klkkmlgpsaveigngcfetkhkcnqtcldriaagtfnagdfslptfd