10            20        30        40        50          
UCUAUAGAGAAAAAUGU----|   AU   UG  UC  U    CCCU         CUUAUCA 
                     UUGU  GGC  AU  CC GAGA    AACUUGUGA       \
                     AACG  CCG  UA  GG CUCU    UUGAACACU       C
UUGAUAUAUUUUUGUCAUUCG^   --   GU  U-  C    AGUU         UUGAGUU 
.       110       100          90         80        70