Описание

Appearance: white amorphous powder
Specific activity: ≥40U/mg
Stability: stable for one year at -20℃
Molecular weight: approx. 35KD
Isoelectric point: 4.8
Molarity: 5.3×10-5M (L-Malate), 3.1×10-5M (Oxaloacetate),6.2×10-6M (NADH)
Inhibitor: not inhibited by sodium azide
pH stability: 3.0~8.5(25℃ 24h)
Optimal pH: 8.0~8.5
Optimal temperature: 65℃
Thermal stability: stable below 60℃
Storage temperature: -20℃
Enzyme activity definition: 1 unit of enzyme activity is equal to the amount of enzyme that produces 1 micromole of NAD+ in 1 minute at 37 degrees.

It can catalyze the conversion between malic acid and oxaloacetic acid. It is used in clinical tests for malic acid and glutamic transaminase. It is located in the mitochondrial matrix and is a matrix marker enzyme. It uses NAD+ as an electron acceptor. Broadly speaking, it also includes malic enzyme (EC1.1.1.38-40) that uses NAD+ or NADP+ as a acceptor to produce pyruvate and carbon dioxide. It also weakly reacts with NADP+ and can also dehydrogenate other hydroxy acids. It is widely found in mitochondria and bacterial cell membranes and is an enzyme in the tricarboxylic acid cycle. Due to the different sources of the enzyme, some of its properties are different.

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