G4155
β-Galactosidase from Escherichia coli
aqueous glycerol suspension, ≥500 units/mg protein (biuret)
Synonim(y):
β-D-Galactoside galactohydrolase, Lactase
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About This Item
Numer CAS:
Numer MDL:
Kod UNSPSC:
12352204
NACRES:
NA.54
Polecane produkty
Postać
aqueous glycerol suspension
Poziom jakości
aktywność właściwa
≥500 units/mg protein (biuret)
masa cząsteczkowa
465 kDa
temp. przechowywania
−20°C
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Zastosowanie
β-Galactosidase is used in the enzymatic assays in the synthesis of imidazolo-pyrrolidinoses.
Działania biochem./fizjol.
β-galactosidase cleaves lactose into its monosaccharide components, glucose and galactose. It also catalyses the transglycosylation of glucose into allolactose, the inducer of β-galactosidase, in a feedback loop.
Właściwości fizyczne
Tetramer molecular weight 465 kDa (subunits 116.3 kDa each)
Definicja jednostki
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.
Postać fizyczna
Suspension in 50% glycerol, 5 mM Tris buffer salts, 5 mM magnesium chloride, 0.5 mM DTT, 0.5 mM mercaptoethanol. pH 7.4
Inne uwagi
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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inhibitor
Numer produktu
Opis
Cennik
substrat
Numer produktu
Opis
Cennik
Kod klasy składowania
10 - Combustible liquids
Klasa zagrożenia wodnego (WGK)
WGK 2
Temperatura zapłonu (°F)
Not applicable
Temperatura zapłonu (°C)
Not applicable
Certyfikaty analizy (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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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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