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Figure 3.
Fig. 3. Interactions of the SD helix with the ribosome. (a)
Location of the SD helix (yellow) relative to the structure of
16S rRNA in the 70S ribosome initiation-like complex. Helices
23a, 26, and 28, which contact the SD helix, are rendered in
dark blue ribbon representations, and the SD helix is shown in
yellow. (b) Interactions of the SD helix with helices 23a, 26,
and 28 of 16S rRNA. The P-site tRNA is shown in orange. (c)
Secondary structure of T. thermophilus 16S rRNA, showing in bold
the anti-SD region at the 3' end and structural features
(helices 23a, 26, and 28) that interact with the SD helix.
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