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. 2003 Jul;9(7):771–779. doi: 10.1261/rna.5240503

FIGURE 4.

FIGURE 4.

Positions of the two highly conserved Ψs in the large subunit rRNA structure. The position of the two highly conserved Ψs is represented by red spheres (and pointed to by arrows) on the crystal structure (5.5 Å resolution) of the large ribosomal subunit of Thermus thermophilus as determined in Yusupov et al. (2001) (PDB identification number: 1GIY). A backbone representation is used, with rRNAs in blue and proteins in orange. The rRNA regions that are in contact with tRNAs, according to Yusupov et al. (2001), are shown in violet. The structure was displayed using the program RasMol v2.6 (Sayle and Milner-White 1995). (A) View from the small subunit binding face. The approximate regions of the A, P, and E tRNA sites, as well as of helix 69 that carries the two highly conserved Ψs, are pointed to by straight lines. (B) View from the left side of the large subunit.