>2rfuB (B:) observed residues (from ATOM records)
gffgaiagfleggwegmiagwhgytshgahgvavaadlkstqeainkitknlnslselev
knlqrlsgamdelhneileldekvddlradtissqielavllsnegiinsedehllaler
klkkmlgpsavdigngcfetkhkcnqtcldriaagtfnagefslptfds