10 20 30 40 50 UCGUUCUCCAAGAAUGUU--| G UC UC U C UAACUG CCAUGU U UA CUUCAU CCAC GGAGUCUG U GGUACA A AU GAAGUG GGUG CUUUAGAC U UCCGCUGGCCUCCACGUAGU^ G GA GU U A CAAUUU . 110 100 90 80 70 60