Enzymes are proteins that catalyze biological reactions. The chemistry of life is complex. Enzymes lower energy barriers so reactions occur naturally, in water, without excess heat or pressure. For every chemical reaction that occurs in life, there's an enzyme that specializes in making that process quick and easy. An enzyme "finds" its target in complex mixtures: resulting in specificity, selectivity, and sensitivity. The nitrate reductase from plants - our first enzyme product - reduces nitrate to nitrite, a first step in the chain that turns the elements into proteins and DNA. We eat NaR every day. NaR replaces cadmium, zinc, or vanadium reagents for reliable and environmentally benign nitrate measurement, in any lab format and for on-site nitrate testing of anything aqueous.