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Eukaryotic Initiation Factor-3: A multisubunit eukaryotic initiation factor that contains at least 8 distinct polypeptides. It plays a role in recycling of ribosomal subunits to the site of transcription initiation by promoting the dissociation of non-translating ribosomal subunits. It also is involved in promoting the binding of a ternary complex of Eukaryotic initiation factor-2; Gtp; and Initiator trna to the 40S ribosomal subunit.
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