Fig. 1.
Cap-dependent and IRES-mediated translation initiation. (A) - (C) eIF4E binding to the m7G-cap and binding of eIF4G result in recruitment of 40S ribosomal subunits to eukaryotic mRNAs. (D) Alternatively, IRES-mediated translation occurs without involvement of the 5’ terminus or eIF4E and, at least for poliovirus [47], likely occurs via direct eIF4G binding to the IRES.
