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Please contact your local representative.", "ReadyForUse": "", "OrderInformation": "Will be supplied as \"GlDH, Lyo., rec.\". Unit of measure is \"MU\"." } ] }, "Product2Products": { "Product2ProductReference": [ ] }, "ProductSpec": [ { "ProductSpecVariant": { "Chapters": [ { "Language": "en", "Value": "Will be supplied as \"GlDH, Lyo., rec.\". Unit of measure is \"MU\".", "Country": "XG", "Code": "CB - Order Information", "Name": "CB - Order Information" }, { "Language": "en", "Value": "Use recombinant Glutamate Dehydrogenase in diagnostic tests for the determination of ammonia, urea, L-glutamate, glutamate pyruvate transaminase and leucine aminopeptidase.", "Country": "XG", "Code": "Applications", "Name": "Applications" }, { "Language": "en", "Value": "Recombinant glutamate dehydrogenase.", "Country": "XG", "Code": "Positioning", "Name": "Positioning" }, { "Language": "en", "Value": "Nomenclature: L-glutamate:NAD(P)+ oxidoreductase (deaminating)
CAS Number: 9029-11-2
Molecular weight: ~2 200 kD for the associated enzyme with 8 subunits; 280 kD for one subunit.
Michaelis constants (Tris buffer, pH 8.0, +23°C):
L-glutamate: 1.8 x 10-3 mol/L
NADP: 4.7 x 10-5 mol/L
α-ketoglutarate: 7.0 x 10-4 mol/L
NH4+: 3.2 x 10-3 mol/L
NADPH: 2.6 x 10-5 mol/L
Km values for NAD or NADH are difficult to obtain due to their inhibitory action.
Inhibitors: 4-chloromercuribenzoate, Na2S, diethyldithiocarbamate, 1,10-phenanthroline,
8-hydroxyquinoline, NaN3, thyroxine, heparin, sulfonylcarbamides, Cu2+, Hg2+, Ag2+, Fe3+, Zn2+, K+, PO42-, NO3-
Activators: Thioglycolic acid, b-mercaptoethylamine, EDTA, α, α'-dipyridyl
pH optimum: 8.0 (see figure)
Temperature dependence: See figure
pH stability: 5.5-6.5 (see figure)
Thermal stability: Up to +60°C (see figure)
Specificity: The oxidation of L-glutamate is stimulated by ADP and inhibited by GTP. In contrast, the oxidation of alanine, leucine, isoleucine, methionine, valine, norleucine, norvaline and 2-aminobutyrates is stimulated by GTP and inhibited by ADP.", "Country": "XG", "Code": "Properties", "Name": "Properties" }, { "Language": "en", "Value": "Appearance: White lyophilizate
Solubility: Clear, colorless solution in water (c=20 mg/mL)
pH value (c=20 mg/L in water): 6.5-7.5
Activity (+25°C, α-ketoglutarat): ≥80 U/mg lyophilizate
Contaminants (expressed as percentage of Glutamate Dehydrogenase activity):
Alcohol dehydrogenase: ≤0.005
Lactate dehydrogenase: ≤0.005
Malate dehydrogenase: ≤0.005
''NADH-Oxidase'': ≤0.005
NH4: ≤0.05 μg/mg lyophilizate
Stability: At +2 to +8°C within specification range for 12 months. Store dry.", "Country": "XG", "Code": "Specification", "Name": "Specification" } ] } } ] }

Glutamate Dehydrogenase (NAD(P))

from E.coli overproducer, lyophilizate

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