10 20 30 40 50 GAGAUGUUGGUGCCAGCACCAUCC-- GU U A-| G GCAUGCA AGGGU GUGACUGG UG CCA AGGG C UCCCA CACUGAUC AC GGU UCCC U UUAGAAGGACGCACUCUAACUACGAC AC C CG^ G ACUUGUG . 110 100 90 80 70 60