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Figure 2.
Figure 2. Fourier Difference Maps of mRNAs(A) 7 Å
Fourier difference map of MK27 mRNA with the mRNA model (yellow)
docked, showing the position of the Shine-Dalgarno (S/D) helix
(magenta) and the positions of the A- and P-site codons (orange
and red, respectively), viewed from the top of the 30S
ribosomal subunit.(B) Difference map of the MF36 mRNA, showing a
four-base-pair tetraloop helix (A-site helix) fitted to the
extra density at the A site.(C) Same as for (B), except that the
A-tRNA anticodon stem-loop (green) is shown in the position
observed experimentally in the A-tRNA difference map (Yusupov et
al., 2001), in place of the A-site mRNA helix. The
five-nucleotide (GGAGG/CCUCC) core of the Shine-Dalgarno
interaction is shown in magenta, and the rest of the 16S rRNA
tail in cyan
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