3U7X:
reference: Structural Insights into the Allosteric Effects of 4EBP1 on the Eukaryotic Translation Initiation Factor eIF4E., Siddiqui N, Tempel W, Nedyalkova L, Volpon L, Wernimont AK, Osborne MJ, Park HW, Borden KL, J Mol Biol. 2011 Dec 9. PMID: 22178476

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