10          20        30        40        50          
AAUAAAUAUUUGAUUCU--|   A                   G  CA       AAGUAA 
                   UUUA AUGCAAAAUUUUGAUUGUU CU  GAAUGUC      \
                   GAAU UGCGUUUUGAAACUAACAA GA  CUUACAG      A
CUAAUCUUUUACUCAACUC^   C                   -  AC       GUGAGU 
.       110       100        90        80         70