10          20        30        40        50        60
AAAGAAUAAGCAUGACU--|  UG    A  AC       U     C     A  CGUAUA 
                   GGC  AUCC AU  UAAGUAC AGUGC GCAGG GU      U
                   CCG  UAGG UA  AUUCGUG UCAUG UGUCC CA      U
ACGUAAGGUCUACUUAUAA^  UG    A  CA       U     C     -  AUGAGU 
 .       110       100        90        80        70