10 20 30 40 50 ACGGCUUCAGGUGACAUA--| A C - C AAUGAUGG CGGC CGGUG GAGGGG GUCGUACGU AUGCAG \ GUCG GCCAC UUCCCU CAGCGUGCG UGCGUC U AUAGAGACCGGCCUCUCUGG^ A - U U GCAUAAGG . 110 100 90 80 70