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Eukaryotic translation initiation factor 4E-binding protein 1(EIF4EBP1), is a member of 4E-BPs family, which regulate the translation of a subset of mRNAs by competing with eIF4G for binding to eIF4E, thus preventing the assembly of the eIF4F complex. The eIF4F facilitates the recruitment of other translation initiation facotrs to form the complex and then initiates cap-dependent translation. It also mediates the regulation of protein translation by growth factors, hormones and other stimuli that signal through the MAP kinase and mTORC1 pathways. There are three forms of EIF4EP1, alpha, beta and gamma.