10            20        30         40        50         
GUCGGGUAAAGUACAUG----|   CU     A  G       -    U     C  UAGAAA 
                     CUCA  UGUGA CA CGGCUUG CGGG CCAGU GG      \
                     GAGU  ACACU GU GCUGAAC GUCC GGUCA CC      G
GUACAUAUACCUACGCUCGAC^   --     C  G       C    -     U  UUUAGA 
       110       100          90        80         70        60