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binds specifically to this cap structure. It is a 24-kD polypeptide that exists both in a free form and as part of the eIF4F pre-initiation complex.The other subunits of eIF4F are a 47-kD polypeptide, termed eIF4A, that possesses ATPase and RNA helicase activities, and a 220-kD scaffolding polypeptide, eIF4G.eIF4E is found in the nucleus of many mammalian

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