10 20 30 40 50 UCGUCUCGUCCAGAUGU- AUAC- UGA GU -| CCA UCAGU CAGA CG AG UCGG GU UUCCAUCAGC U GUCU GC UC AGCC CG AAGGUAGUUG U GUUGACUAGCUGCUCUCU CUCUU UCC UG U^ A-- UUGGU 110 100 90 80 70 60