10          20        30        40        50         
GGAAAGGAAGACUCACU--|      C       G     A  CAC       CUAAAUG 
                   GAGAUGG GGGGCAA CCCUU CC   CUCUUUG       U
                   CUCUACU CCUCGUU GGGAA GG   GAGAAAC       U
GGUGGUCUCCACUUCUACA^      U       -     -  AAA       UAAUCGU 
      110       100        90         80         70        60