Figure 7.

Schematic interpretation of U3 snoRNA-35S pre-rRNA interactions in ΔErb1 and Δ5 based on the SHAPE reactivity results presented in this study. The nucleotides of the 5′ end of U3 snoRNA are represented in red and the sequence of relevant parts of 35S pre-rRNA in black, other parts are indicated by broken lines. Regions involved in base pair interactions are delimited by numbers and base pairs are shown by connecting lines or dots. Numbering for the 5′ETS starts at the 5′ end of 35S pre-rRNA. The numbering of the beginning of the 18S rRNA part of 35S pre-rRNA starts at the A₁ cleavage site (pointed out).