10          20        30        40        50        60  
CCUGGUGCAGAGAACCUAA--|    U     A          CU       A  UUGGGCAG 
                     AGGUU GGGGG ACAUUCAACG  GUCGGUG GU        U
                     UCCGA UCCCC UGUGAGUUGC  CAGCCAC CA        A
CCGGGCCGUCCGCCGUCCAGA^    C     A          --       -  AAUUGGAG 
 120       110       100        90          80         70