Figure 15-12: Comparison of RNA secondary structures in the 3' UTR in four representative RNA phages. SP is a species IV allolevivirus. PP7 and AP205 resemble SP in their simple 3' UTR structure. MS2 has a more elaborate folding with many extra elements (shaded). The stopcodon of replicase is boxed (R stop). Also boxed is a conserved sequence in the top of U1 (UGCUU). In Q_β and SP these nucleotides form a pseudoknot with their complement 1200 nts upstream (Fig. 15-6). For MS2, PP7 and AP205 a similar interaction is supposed to exist. (for better image quality, click here for tif image, which may be quite large; may also require screen refreshing plus special software to view; or view larger tif in separate window)

Figure 15-1, Figure 15-2 ( a,  b ), Figure 15-3, Figure 15-4, Figure 15-5, Figure 15-6, Figure 15-7, Figure 15-8, Figure 15-9 ( a,  b ), Figure 15-10, Figure 15-11, Figure 15-12, Figure 15-13,

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