10 20 30 40 50 GUCCUGGUGUCGAGGCUA-- U C --| UGAAC UCGGUUACU GC CGUUAUAGU GGCUGUGAUGUG A GGUCGGUGG CG GCAGUAUCG CCGACACUAUGC U CAGUACGAUCGCCUGUAUCA U A AC^ UUGGU . 110 100 90 80 70 60