10 20 30 40 50 UCUGCUGAUAGAAUAGGC- UGCC -| G U UU GGGG CCGGAA UAUCA GAGGACGCAU CG \ CCCU GGCCUU AUAGU CUCCUGCGUA GC U AUUUACGCUCCACCGUAAA UACU C^ G C AU 100 90 80 70 60