10 20 30 40 50 GUCUUACGUUUUGGAAG--| A CU C C UGUCAU CUUUAAAGU CU AGCAGCA AU AUGAUUUGUA A GAAAUUUUA GA UCGUCGU UA UACUGAACGU G UUAAAGUUGACUAAGAGAA^ A UU U U AUAAAU . 110 100 90 80 70 60