
The snlRNAs of C. elegans. (A) Sequence of the IM3 motif of snlRNAs (E = 1.8 × 10–37). (B) Internal position of IM3 in the snlRNAs. (C) Relative expression of five snlRNAs and two C. elegans cyclin mRNAs (T06E6.2 and F43D2.1; Wang and Kim 2003). (D) Comparison of the secondary structures of snlRNA CeN25-1 and snRNA U1. In addition to the Sm-binding site, both RNAs show a similar 3′-tail stem-loop structure, but the remainder of the IM3 motif is absent in U1 snRNA.











