10            20        30        40        50          
GUGACAUGUGCAAAUGU----|   AUGG UG  UC  U    CCCU         CUUUUAA 
                     UUGU    C  AU  CC GAGA    AACUUGUGA       \
                     AACG    G  UA  GG CUCU    UUGAACACU       U
AAAAAUGAUUGUAGUCGUUCA^   CA-- GU  U-  C    AGUU         UUGACCA 
.       110       100          90         80        70