Model depicting the major participants that are involved in translational initiation in eukaryotic mRNAs. Interactions of eukaryotic translation initiation factors eIF2 (2), eIF3 (3), and initiator tRNA with a 40S ribosomal subunit, eIF4E (4E), eIF4A (4A), and eIF4G (4G) with the m7G cap structure, and the polyadenosine binding protein PABP with the polyadenosine tail in an mRNA are shown.