10 20 30 40 50 UCUUAAGGUACCAUGUA---| G U AAC U - AGG CGAAU GG CC UUGGCACUU GG AAUUGUCACA U GCUUA CU GG AACCGUGGA CC UUGACAGUGU A CAUCUACGAUACUACGGAUC^ A - CCA - A UAA 110 100 90 80 70 60