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48275
β-Galactosidase from Escherichia coli
suitable for enzyme immunoassay, lyophilized, powder, ~140 U/mg
Synonim(y):
β-D-Galactoside galactohydrolase, Lactase
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About This Item
Polecane produkty
Formularz
powder
jakość
lyophilized
aktywność właściwa
~140 U/mg
masa cząsteczkowa
Mr ~135000
zawiera
phosphate buffer as stabilizer
sucrose as stabilizer
metody
enzyme immunoassay: suitable
Warunki transportu
wet ice
temp. przechowywania
−20°C
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Zastosowanie
Aqueous solution may be used directly for derivatization without previous dialysis or gel permeation chromatography.
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.
Opakowanie
Bottomless glass bottle. Contents are inside inserted fused cone.
Właściwości fizyczne
Tetramer molecular weight 465 kDa (subunits 116.3 kDa each)
Definicja jednostki
1 U corresponds to the amount of enzyme which hydrolyzes 1 μmol 2-nitrophenyl-β-D-galactopyranoside (Cat. No. 73660) per minute at pH 7.8 and 37 °C
Inne uwagi
Used in a highly sensitive enzyme-linked immunoassay of human IgG with 4-methylumbelliferyl-β-D-galactoside (Catalog No. 69590); Evaluation of β-D-galactosidase (E. coli) and horse radish peroxidase as labels by sandwich enzyme immunoassay technique; Enzyme immunoassay of thyrptropin releasing hormone (TRH); Preparation of enzyme-antibody conjugates
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Kod klasy składowania
11 - Combustible Solids
Klasa zagrożenia wodnego (WGK)
WGK 3
Temperatura zapłonu (°F)
Not applicable
Temperatura zapłonu (°C)
Not applicable
Środki ochrony indywidualnej
Eyeshields, Gloves, type N95 (US)
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M Takeyama et al.
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A sensitive and specific double-antibody enzyme immunoassay (EIA) for a thyrotropin releasing hormone (TRH)-like immunoreactive substance has been developed. In order to synthesize TRH-labeled beta-D-galactosidase (beta-gal), a newly devised TRH derivative, pGlu-His-Pro-NH-(CH2)6-NH2 (TRH-Hex), was employed. TRH-Hex was linked to beta-gal
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M Imagawa et al.
Annals of clinical biochemistry, 21 ( Pt 4), 310-317 (1984-07-01)
beta-D-galactosidase from Escherichia coli and horseradish peroxidase were evaluated as labels of Fab' in dose-response curves for human alpha-fetoprotein and human chorionic gonadotropin by sandwich enzyme immunoassay technique using fluorogenic substrates for enzyme assay. The non-specific binding of Fab'-peroxidase conjugates
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