Elongation factors are a set of proteins that are used in protein synthesis in the process of cell cycle and elongation in some cells. In the ribosome, they facilitate translational elongation, from the formation of the first peptide bond to the formation of the last one. Bacteria and eukaryotes use elongation factors that are largely homologous to each other, but with a different nomenclature. Elongation factors are a set of proteins that are used in protein synthesis in the process of cell cycle and elongation in some cells. In the ribosome, they facilitate translational elongation, from the formation of the first peptide bond to the formation of the last one. Bacteria and eukaryotes use elongation factors that are largely homologous to each other, but with a different nomenclature.