10          20        30        40        50        
CCAUUAAUGAUUUUAGA--|  A            U         CUA    AGCUGUA 
                   GUC AUUAUUUUCUGU UUAUUGGAG   UUCA       A
                   CAG UAGUAAAAGACA AAUAAUCUC   AAGU       A
GUAAAGAGGUUAGUAAUUC^  A            U         UAG    CUGUUGU 
      110       100        90        80        70        60