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. 2011 May 27;286(29):25604–25610. doi: 10.1074/jbc.M111.256255

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© 2011 by The American Society for Biochemistry and Molecular Biology, Inc.

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FIGURE 3. — A1913 is critical for tRNA accommodation. Observed rates (k_pep) of peptide bond formation measured by following the formation of fMet-AA dipeptide for wild-type (WT) and H69 variant ribosomes for tRNA^Ile on AUU (decoded by tRNA_GAU^Ile) and AUA (decoded by tRNA_k2CAU^Ile) codons (A) and tRNA_IGC^Arg on CGU, CGA, and CGC codons (B). Shown is the time course of peptide bond formation (C) for tRNA_IGC^Arg on CGU (circles) and CGA (squares) codons with wild-type (WT, black lines) and A1913U (1913, red lines) ribosomes. Fraction dipeptide values are normalized to the plateau of the CGU measurements. Error bars represent S.E.