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Malic Dehydrogenase from porcine heart

buffered aqueous glycerol solution, 600-1000 units/mg protein (biuret)

L-Malate: NAD+ oxidoreductase, MDH, Malate Dehydrogenase
Enzyme Commission number:
MDL number:


buffered aqueous glycerol solution

Quality Level

specific activity

600-1000 units/mg protein (biuret)

cation traces

NH4+: ≤10 μg/mg protein

foreign activity

Glutamic-Oxalacetic Transaminase ≤0.01%
Glutamic-Pyruvic Transaminase ≤0.01%

shipped in

wet ice

storage temp.


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General description

Malic dehydrogenase is a mitochondrial isozyme and an important catalyst in the tricarboxylic acid cycle.
Mitochondrial Isozyme


Malic dehydrogenase has been used in a study to assess the comparative molluscicidal action of Ginko biloba extract on snail hosts. [41] It has also been used in a study to investigate the effect of early feed restriction on metabolic programming and compensatory growth in broiler chickens. [07]

Biochem/physiol Actions

Eukaryotic cells contain two different isozymes of malate dehydrogenase: mitochondrial (m-MDH) and soluble or cytoplasmic (s-MDH). This product consists of the mitochondrial form.
The enzyme catalyzes the following reaction:Oxaloacetate + β-NADH → L-Malate + β-NAD
Malic Dehydrogenase can be reversibly inactivated by treatment with pyridoxal 5′-phosphate at 25 °C. [37]

Unit Definition

One unit will convert 1.0 μmole of oxalacetate and β-NADH to L-malate and β-NAD per min at pH 7.5 at 25 °C.

Physical form

Solution in 50% glycerol containing 0.05 M potassium phosphate buffer, pH 7.5

Storage Class Code

12 - Non Combustible Liquids



Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificate of Analysis

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Certificate of Origin

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