10 20 30 40 50 CACCUCAACAUGUCAAUC--| UUA A UAAUCU UGUACUCUUUGG CAGUUGUUCAACC GUUAC A ACGUGGGAAACC GUCAACAAGUUGG CAAUG A AGUGACUUUACAAAGGUGAA^ CAA C UUAAUC . 110 100 90 80 70 60