Enolpyruvyl-shikimate phosphate synthase. An enzyme produced by virtually all plants, it is essential in a plant’s metabolism biochemical pathway, and for the biosynthesis (i.e., creation) of aromatic (ring-shaped) amino acids. Some (glyphosate-containing) herbicides kill unwanted plants (e.g., weeds) by inhibiting EPSP synthase. By incorporating a gene that causes (over-) production of CP4 EPSP synthase into several crops (e.g., soybeans, cotton, etc.), scientists have been able to help those crops to survive post-emergence application(s) of glyphosate-containing herbicide. Additional resistance to glyphosate-containing herbicide can be conferred to plants via incorporation into plants of a gene (GO) which causes those plants to produce glyphosate oxidase.