10            20        30        40        50        60
GGCAAUAUUAAAUUGUG----|   CU    A            CU       A  GUGGCAU 
                     GUUG  GUAG GUUUUAGAAUUC  ACGCUUU CC       A
                     UAGC  CAUC CAAAGUCUUAGG  UGCGAAA GG       C
AAAAAAAAUUGUACUAUUACC^   --    C            UU       C  CUUAAAG 
120       110       100          90        80        70