Tags: Enzyme.
In enzymology an elongation factor 2 kinase (EC 2.7.11.20) is an enzyme that catalyzes the chemical reactionATP + [elongation factor 2] ADP + [elongation factor 2] phosphateThus the two substrates of this enzyme are ATP and elongation factor 2 whereas its two products are ADP and elongation factor 2 phosphate.This enzyme belongs to the family of transferases specifically those transferring a phosphate group to the sidechain oxygen atom of serine or threonine residues in proteins (protein-serine/threonine kinases).