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ATP-dependent RNA helicase which is a subunit of the eIF4F complex involved in cap recognition and isrequired for mRNA binding to ribosome. In the current model of translation initiation, eIF4A unwinds RNA secondarystructures in the 5'-UTR of mRNAs which is necessary to allow efficient binding of the small ribosomal subunit, andsubsequent scanning for the initiator codon