P0294
Pyruvate Kinase/Lactic Dehydrogenase enzymes from rabbit muscle
For the Determination of ADP, buffered aqueous glycerol solution
Sinónimos:
PK/LDH enzymes from rabbit muscle
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About This Item
Código UNSPSC:
12352204
NACRES:
NA.54
Productos recomendados
Nivel de calidad
Formulario
buffered aqueous glycerol solution
mol peso
59 kDa
concentración
600-1,000 units/mL pyruvate kinase
900-1400 units/mL lactic dehydrogenase
temp. de almacenamiento
−20°C
Descripción general
Pyruvate Kinase from rabbit muscle is a metalloenzyme which catalyzes the conversion of phosphoenol pyruvate to pyruvate in the glycolysis pathway. It corresponds to a molecular weight of 59 kDa. It exists as a tetramer and undergoes conformational changes in the active site to accommodate substrate. Lactic dehydrogenase (LDH) catalyzes the lactate to pyruvate conversion in anaerobic glycolysis. It exists as tetramer and comprises of two subunits (H and M). The LDH of eukaryotes undergo active-site loop gating for their catalytic functionality.
Aplicación
Pyruvate Kinase/Lactic Dehydrogenase enzymes from rabbit muscle has been used:
- for ATP generation in the active microtubule preparation
- in the enzyme linked ATPase assay of skeletal muscle heavy meromyosin (HMM)
- as a standard control for quantifying mesenchymal stem cells (MSCs) lactate dehydrogenase
Acciones bioquímicas o fisiológicas
ADP Quantification Assay protocol for the use of PK/LDH in the determination of ADP. Solutions containing unkown concentrations of ADP can be substuted for reagent D in this protocol. Further dilutions of the ADP solution may be required
Lactate dehydrogenase from rabbit muscle can be inhibited by ascorbate. Aldolase and actin were shown to block this inhibitory effect.
Pyruvate kinase also catalyzes the phosphorylation of thiamine diphosphate (TDP) to thiamine triphosphate (TTP) which may find application in antiviral and tumor therapy.
Pyruvate kinase requires bivalent and monovalent cations such as Mg2+ and K+ respectively for activation to occur.
Definición de unidad
Pyruvate kinase activity: One unit will convert 1.0 μmole of phospho(enol)pyruvate to pyruvate per min at pH 7.6 at 37 °C.
Lactic dehydrogenase activity: One unit will reduce 1.0 μmole of pyruvate to L-lactate per min at pH 7.5 at 37 °C.
Lactic dehydrogenase activity: One unit will reduce 1.0 μmole of pyruvate to L-lactate per min at pH 7.5 at 37 °C.
Forma física
Solution in 50% glycerol containing 10 mM HEPES, pH 7.0, 100 mM KCl and 0.1 mM EDTA
Código de clase de almacenamiento
10 - Combustible liquids
Clase de riesgo para el agua (WGK)
WGK 2
Punto de inflamabilidad (°F)
Not applicable
Punto de inflamabilidad (°C)
Not applicable
Equipo de protección personal
Eyeshields, Gloves, multi-purpose combination respirator cartridge (US)
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