The universally conserved nucleotides of the small subunit ribosomal RNAs

Contacts between EF-G and universal clusters in 16S rRNA. Different binding orientations and contacts of EF-G in the cryo-EM structure of a pretranslocation complex (A–D) (Brilot et al. 2013), crystal structure of a chimeric hybrid-state complex (E–H) (Zhou et al. 2014), and crystal structure of a post-translocation complex (I–L) (Table 3; Gao et al. 2009). EF-G is shown in orange; coloring of 16S rRNA is as in Figures 5 and 6. Ribosomal proteins, mRNAs, and tRNAs are not shown.