FIGURE 5.
Comparison with tRNA bound to the E site in the 70S structure. (A) The minihelix (orange) is in a position similar to the tRNA (green) bound to the 70S ribosome E site tRNA. Corresponding phosphorous atoms of the H. marismortui 50S subunit and T. thermophilus 70S ribosome were superimposed to allow the comparison. (B) A yeast tRNAphe (red) superimposed onto the duplex portion of the minihelix (orange) has its anticodon stem–loop closer to the anticodon stem loop of a tRNA bound in the 30S P site (blue) than a tRNA bound in the 30S E site (green).