10 20 30 40 50 CGAGCGUGCAGUGCCGU- --| G A AA A A UGGCUUC GGG GGAGAGGG GA GACGGGAG GAG AG GAG \ CCC CCUCUUCU UU CUGCCCUC CUC UC CUC A CCUAAGUGUCUCUCCUGU GU^ G - CC C A CUCUGGU . 110 100 90 80 70