This case study examines the approved product glufosinate-tolerant soybeans. This variety of soybean was genetically engineered by AgrEvo (now Aventis) to be tolerant to the herbicide glufosinate ammonium (herein referred to as glufosinate), a chemical already in agricultural use. A modified bacterium gene was added to the soybean so that the plant produces an enzyme that breaks down the herbicide before it can harm the soybean plant. Genetic material from other sources was inserted to control the expression of the enzyme. As with many other genetically engineered products, glufosinate tolerant soybeans are regulated by various regulatory agencies as described in the ?Coordinated Framework for Regulation of Biotechnology? (Office of Science and Technology Policy (OSTP), 1986).