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Components of the translation machinery that have the potential to contribute to functional heterogeneity. Structures were visualized with Polyview 3D software [125] using the following maps: E. coli large ribosomal subunit (LSU; pdb accession code: 3d5a [126], rRNA in light gray, proteins in dark gray); small ribosomal subunit (SSU; pdb accession code: 3d5b [126]); E. coli IF2 (pdb accession code: 1g7r [127]); human eIF3 (EMD-2166 [128]); yeast tRNAPhe (pdb accession code: 6tna [129]).
