Involved in peptide bond synthesis. Stimulates efficient translation and peptide-bond synthesis on native or reconstituted 70S ribosomes in vitro. Probably functions indirectly by altering the affinity of the ribosome for aminoacyl-tRNA, thus increasing their reactivity as acceptors for peptidyl transferase. Protein biosynthesis; polypeptide chain elongation. Glycosylated ar Arg-32 by EarP: arginine rhamnosylation is required for EF-P function and rescue of polyproline stalled ribosomes. Belongs to the elongation factor P family.