Figure 9. Schematic illustration of RNA 2 structure.

Rectangles represent the bases of the indicated nucleotides. Base stacking is indicated by adjacent, parallel rectangles. Sugar pucker, as estimated from J_1′-2′, is indicated by shading of pentagons representing the ribose ring for each nucleotide. Lines pointing to internucleotide linkages indicate relative intensity of Mg²⁺-induced cleavage at each position.