10          20        30        40         50         
AUGCACUGUUACCGAGU--           GUA  A      -| U         AUGUGC 
                   GGGGUGCAGGA   UG CCUACA AA UGACAGACG      \
                   CCUCAUGUCCU   AC GGAUGU UU ACUGUCUGU      C
ACCACAGACCCCAACUCCG           ACA  C      C^ C         CUGAGU 
.       110       100        90        80        70        60