10         20         30        40        50         
GAUCACACACAGGAGUA-   AG-|       U                     GUAAAU 
                  GGA   UGCCCUGA CGUGUGAAACUCUUUCCACAU      \
                  CCU   AUGGGACU GCGCACUUUGAGAAAGGUGUA      U
CACUAGUGACCACAGAGA   CCA^       U                     AACCGU 
       110       100        90        80        70        60