Average translation rate in eukaryotes is
Eukaryotic cytosolic translation elongation averages around 2 to 4 amino acids per second, markedly slower than prokaryotes. Lower rate reflects larger ribosome structure, nuclear separation, extensive regulation by eIFs and eEFs, scanning through 5' UTR secondary structures, co-translational protein folding and quality control involving chaperones at exit tunnel, and more complex signaling like eIF2alpha phosphorylation. Despite slower speed per ribosome, overall protein output maintained via polysomes, abundant ribosomes, and compartmentalized mRNA localization permitting controlled synthesi
Ref: Lodish et al., Molecular Cell Biology, 9th ed., Chapter 7, Eukaryotic translation rate 2-4 aa per second slower
