10 20 30 40 50 GCCUGAGGGCGAAGUUC- CU-| C AA G U A UUCUAGU ACC GC GCCUA CCCGUA AA CGA CUUGUG \ UGG UG CGGAU GGGUAU UU GCU GAACAC A AACAGCGGCGACGUGUGG UAG^ U CC G U C UGCAGUC . 110 100 90 80 70