10 20 30 40 50 GUCUCUGUCUCUCUCUC- A - -| AGUAAU GC GCUGCCGGCG UCAUUUUUGUGAUU UGCAGCU C UG CGACGGUUGC AGUGAAAACACUGA ACGUUGA U UACGAGGUACGUCGUCCG C U U^ CCUCGG 110 100 90 80 70 60