10          20        30        40        50        60  
AAUUAGUAUUCACCAGU--|    U        C       A      U      AAUUGAUG 
                   GAACA GACAGGAU UCUUGAG GCCAUA GGAAGG        U
                   UUUGU UUGUUCUG AGAACUC CGGUGU UCUUCC        U
UUCCAGUCAGUCAUUUACC^    U        U       -      -      GGUAAAAC 
  120       110       100        90         80         70