10          20        30        40        50         
UCAAAGGAAGACUCACU--|      C       G     A  CAC       CUAAGUG 
                   GAGAUGG GGAGCAA CCCUU CC   CUCUUUG       U
                   CUCUAUU CCUCGUU GGGAA GG   GAGAGAC       U
GGAGGUCUUCACUUCUACA^      U       -     -  AAA       UAAUUGU 
      110       100        90         80         70        60