10 20 30 40 50 GUACUAAAUUUAAAAGU----| GU UUC -- G UAAUA ACA UGGUG AGUGCUAUUC AUGUGCAA AGU C UGU ACCAC UCAUGGUAAG UACACGUU UCG A CUAUAAUAUACAUCGUACACA^ -- CAU GU A UGCCG . 110 100 90 80 70 60