This protein promotes the GTP-dependent binding of aminoacyl-tRNA to the A-site of ribosomes during protein biosynthesis. Monomer. The N-terminus is blocked. The C-terminus may be subjected to proteolysis. Different sizes are detectable in 2D-gels depending on concentration of the herbicide dichlorprop [(R)-2-(2,4-dichlorophenoxy)propionate]. Belongs to the GTP-binding elongation factor family. EF-Tu/EF-1A subfamily.