10          20        30        40        50         
GUAACAUAUGUCUCUAGC--|                  C              CUUGGG 
                    CCUAGCUUGGUUCUAAAUC CAUGGUGCCUUCUC      \
                    GGAUUGAACUAAGAUUUAG GUAUCACGGAAGAG      A
UCCAUUGGACAUAGACGUCA^                  A              ACAAAA 
       110       100        90        80        70        60