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About This Item
CAS Number:
UNSPSC Code:
12352204
NACRES:
NA.54
EC Number:
MDL number:
Specific activity:
≥200 units/mg protein
Biological source:
bacterial (Pseudomonas lemoignei)
biological source
bacterial (Pseudomonas lemoignei)
Quality Segment
form
lyophilized powder
specific activity
≥200 units/mg protein
purified by
chromatography
foreign activity
lactic dehydrogenase ≤0.05%, malic dehydrogenase ≤0.1%
storage temp.
−20°C
General description
D-β-hydroxybutyrate dehydrogenase (BDH) is a membrane bound lipid-requiring enzyme.
Application
Suitable for the determination of acetoacetate and D (-)-3-hydroxybutyrate by the method of Williamson, D. H., and Mellanby, J., Methods of Enzymatic Analysis, Bergmeyer, H., ed., 2nd edition, 4, 1836 (1974).
β-Hydroxybutyrate Dehydrogenase from Pseudomonas lemoignei has been used in coupled assay to confirm the formation of acetoacetate.
Biochem/physiol Actions
In mammalian systems, β-hydroxybutyrate dehydrogenase is localized on the inner mitochondrial membrane and requires phosphatidyl choline for activity. In contrast, the enzyme from Pseudomonas is a soluble cytosolic enzyme that does not require a phospholipid allosteric activator. The enzyme is required for the utilization of ketone bodies as a source of metabolic energy. It catalyzes the oxidation of 3-hydroxybutyrate to acetoacetate, the first step in the conversion of ketone bodies to citric acid, which is then further metabolized via the tricarboxylic acid cycle (Krebs cycle).
In Paracoccus denitrificans, 3-hydroxybutyrate dehydrogenase plays a key role in the degradation of intracellular polyhydroxybutyrate and polyhydroxyvalerate.
Physical form
lyophilized powder containing sucrose, β-NAD and Tris buffer salts
Other Notes
One unit will oxidize 1.0 μmole of D -β-hydroxybutyrate to acetoacetate per min at pH 7.8 at 37 °C.
Storage Class
11 - Combustible Solids
WGK
WGK 3
Flash Point (°F)
Not applicable
Flash Point (°C)
Not applicable
PPE (personal protective equipment)
Eyeshields, Gloves, multi-purpose combination respirator cartridge (US)
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