Preparation:
Ammonium Sulfate suspension

Reaction Equation:
L-Malate + NAD⁺ = Oxalacetate + NADH

Contaminants:
Fumarase (L-malate) < 0.01 %
L-Lactate dehydrogenase (NADH) < 0.01 %
Glutamic-oxalacetic transaminase < 0.01 %
Glutamate dehydrogenase (NAD⁺) < 0.001 %
NADH oxidase < 0.001%

Specific Activity: > 1,000 units/mg protein (at 25°C and pH 7.5)

Conditions for Storage:
Ammonium Sulfate suspension at 0-5°C.