10            20        30        40         50        60        70      
UACACAAUUCAUUUAUCCA----|    UC          UU    -  A       UUGAGGAAAUUAUGUAAUCAAUU 
                       CUUAU  UAAUUGAGUA  CGCA CU GUAUUGA                       \
                       GAAUA  AUUAACUCAU  GCGU GA CAUAACU                       A
UCUGCUACUCGCUACUCCUAGAA^    --          UC    U  -       UGACCGUAAUUAUUUCCUUCUUA 
 150       140       130         120       110        100        90        80