10          20        30        40        50        60
AUCAUAUCGGAAAUACA--| U     A    AC       U GU   UC    GUUGCAA 
                   UA AACAG GAUG  CAACCUG G  CCU  AGAU       C
                   AU UUGUC CUAC  GUUGGAC U  GGG  UCUA       G
AACCUUAGGACUUCCGUAA^ U     C    CC       U UG   GA    CAUUUCG 
120       110       100        90        80        70