FIG. 2.

Sequences of gas5 intron-encoded snoRNAs. Human sequences above are aligned with mouse homologues below; − and ∗ designate identities and deletions, respectively. Boxes C, D′, and D are outlined. Regions of complementarity to rRNA are presented above the snoRNAs, with the rRNA residues targeted for methylation indicated (47). Closed and open circles indicate reported and predicted sites of rRNA methylation, respectively. The arrows denote terminal base pairing potential.