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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
Analysenzertifikate (COA)
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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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S Privitera et al.
The Journal of biological chemistry, 273(11), 6319-6326 (1998-04-16)
Our previous studies showed immunological and functional similarities, as well as partial sequence homology, between the enzymatically inactive alternatively spliced variant of human beta-galactosidase (S-gal) and the 67-kDa elastin/laminin-binding protein (EBP) from sheep. To define the genetic origin of the
J W Callahan
Biochimica et biophysica acta, 1455(2-3), 85-103 (1999-11-26)
GM1 gangliosidosis and Morquio B disease are distinct disorders both clinically and biochemically yet they arise from the same beta-galactosidase enzyme deficiency. On the other hand, galactosialidosis and sialidosis share common clinical and biochemical features, yet they arise from two
E Paschke et al.
Human genetics, 109(2), 159-166 (2001-08-21)
An inherited deficiency in beta-galactosidase can result in GM1 gangliosidosis, with several phenotypes of generalized or chronic psychomotor deterioration, as well as in Morquio disease type B, a characteristic mucopolysaccharidosis free of neurological symptoms. We performed mutation analyses in 17
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