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G4155
ββ-Galactosidase aus E. coli
aqueous glycerol suspension, ≥500 units/mg protein (biuret)
Synonym(e):
β-D-Galactosid-Galactohydrolase, Lactase
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About This Item
CAS-Nummer:
MDL-Nummer:
UNSPSC-Code:
12352204
NACRES:
NA.54
Empfohlene Produkte
Form
aqueous glycerol suspension
Qualitätsniveau
Spezifische Aktivität
≥500 units/mg protein (biuret)
Mol-Gew.
465 kDa
Lagertemp.
−20°C
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Anwendung
β-Galactosidase is used in the enzymatic assays in the synthesis of imidazolo-pyrrolidinoses.
Biochem./physiol. Wirkung
β-Galactosidase spaltet Lactose in ihre Monosaccharid-Komponenten Glucose und Galactose. Außerdem katalysiert sie die Transglycosylierung von Glucose zu Allolactose, dem Induktor von β-Galactosidase, in einem Rückführungsmechanismus.
Physikalische Eigenschaften
Molekulargewicht des Tetramers: 465 kDa (Subunits je 116,3 kDa)
Einheitendefinition
One unit will hydrolyze 1.0 μmole of o-nitrophenyl β-D-galactoside to o-nitrophenol and D-galactose per min at pH 7.3 at 37 °C.
Physikalische Form
Suspension in 50% glycerol, 5 mM Tris buffer salts, 5 mM magnesium chloride, 0.5 mM DTT, 0.5 mM mercaptoethanol. pH 7.4
Sonstige Hinweise
Loss of enzymatic activity can occur if this enzyme is frozen. This enzyme is provided in a 50% glycerol solution and will not freeze if stored at -20° Celsius. It is not recommended that this enzyme preparation be stored in an ultracold freezer (-60 to -100° Celsius).
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Lagerklassenschlüssel
10 - Combustible liquids
WGK
WGK 2
Flammpunkt (°F)
Not applicable
Flammpunkt (°C)
Not applicable
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Bioorganic & medicinal chemistry, 11(17), 3559-3568 (2003-08-07)
The syntheses of four glyco-imidazoles, which are pentose-derivatives belonging to the D-series, as well as the syntheses of their L-enantiomers, are reported. Starting from the known linear xylo, lyxo, arabino, and ribo imidazolo-pentoses in both the L- and the D-series
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H Morreau et al.
The Journal of biological chemistry, 264(34), 20655-20663 (1989-12-05)
We have isolated two cDNAs encoding human lysosomal beta-galactosidase, the enzyme deficient in GM1-gangliosidosis and Morquio B syndrome, and a beta-galactosidase-related protein. In total RNA from normal fibroblasts a major mRNA of about 2.5 kilobases (kb) is recognized by cDNA
A Hinek
Biological chemistry, 377(7-8), 471-480 (1996-07-01)
The 67-kDa protein identical to the enzymatically inactive spliced variant of beta-galactosidase is a major component of the non-integrin cell surface receptor expressed on fibroblasts, smooth muscle cells, chondroblasts, leukocytes, and certain cancer cell types. It recognizes several non-identical hydrophobic
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