After August 17, 2026, Novus Biologicals products and services will no longer be available on this website; you will access all products and services on rndsystems.com. Create your R&D Systems online account today.
Lactate dehydrogenase (LDH) is an ubiquitous enzyme commonly found in wide variety of organisms, including plants and microbes. LDH is involved in the interconversion of the pyruvate and NADH to lactate and NAD+. It is also called Hydroxybutyrate Dehydrogenase (HBD), because it can catalyze the oxidation of hydroxybutyrate (1). In mammals, three types of LDH subunits (35 kDa) are encoded by the genes Ldh-A, Ldh-B, and Ldh-C. All LDH subunits can combine to form various terameric isoenzymes (140 kDa). Lactate dehydrogenase B (LDH-B, heart subunit, LDH-H) is involved in the conversion of L-lactate and NAD to pryruvate and NADH and it is predominantly localized in the heart tissue. Similar to other LDH subunit, LDH-B is considered to be an important marker for germ cell tumor (2).