Ribosome structure
The large ribosomal subunit sits atop the small ribosomal subunit and the mRNA is threaded through a groove near the interface of the two subunits. The intact ribosome has three tRNA binding sites: the A site for incoming aminoacyl-tRNAs; the P site for the peptidyl-tRNA carrying the growing polypeptide chain; and the E site where empty tRNAs exit (not shown in this figure but immediately adjacent to the P site.)
Source
Boundless vets and curates high-quality, openly licensed content from around the Internet. This particular resource used the following sources:
"Translation (biology)."
http://en.wikipedia.org/wiki/Translation_(biology)%23mediaviewer/File:Ribosome_mRNA_translation_en.svg
Wikepedia
Public domain.
%23mediaviewer/File:Ribosome_mRNA_translation_en.svg){kind=link}