This product is lyophilized from a solution containing phosphate buffer and sucrose and may be reconstituted in water. For testing purposes, this product is dissolved at 5 mg/mL in a cold assay buffer. See below to review the composition of the 50 mM Tris assay buffer:
1.0 ml 1 M Tris stock solution
0.4 ml of 0.5 M magnesium chloride stock solution
0.01 ml Mercapto-ethanol
Add to 15 ml H2O
adjust pH 7.3 with HCl 1 M
QS to 20 ml
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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Wybierz wielkość
5 MG
826,00 zł
1 MG
1140,00 zł
25 MG
1840,00 zł
826,00 zł
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Informacje o tej pozycji
Numer CAS:
UNSPSC Code:
12352204
NACRES:
NA.54
EC Number:
232-864-1
MDL number:
Specific activity:
~140 U/mg
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Pozwól nam pomócform
powder
quality
lyophilized
specific activity
~140 U/mg
mol wt
Mr ~135000
contains
phosphate buffer as stabilizer, sucrose as stabilizer
technique(s)
enzyme immunoassay: suitable
shipped in
wet ice
storage temp.
−20°C
Quality Level
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Powiązane kategorie
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Ta pozycja | |||
|---|---|---|---|
| technique(s) enzyme immunoassay: suitable | technique(s) - | technique(s) - | technique(s) - |
| specific activity ~140 U/mg | specific activity ≥250 units/mg protein | specific activity ≥500 units/mg protein | specific activity ≥500 units/mg protein (biuret) |
| form powder | form lyophilized powder | form lyophilized powder | form aqueous glycerol suspension |
| storage temp. −20°C | storage temp. −20°C | storage temp. −20°C | storage temp. −20°C |
| shipped in wet ice | shipped in wet ice | shipped in - | shipped in - |
| mol wt Mr ~135000 | mol wt 465 kDa | mol wt 465 kDa | mol wt 465 kDa |
General description
Tetramer molecular weight 465 kDa (subunits 116.3 kDa each)
Application
Aqueous solution may be used directly for derivatization without previous dialysis or gel permeation chromatography.
Biochem/physiol Actions
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.
Packaging
Bottomless glass bottle. Contents are inside inserted fused cone.
Other Notes
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
Used in a highly sensitive enzyme-linked immunoassay of human IgG with 4-methylumbelliferyl-β-D-galactoside (Catalog No. 69590) [1]; Evaluation of β-D-galactosidase (E. coli) and horse radish peroxidase as labels by sandwich enzyme immunoassay technique [2]; Enzyme immunoassay of thyrptropin releasing hormone (TRH) [3]; Preparation of enzyme-antibody conjugates.
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Klasa składowania
11 - Combustible Solids
wgk
WGK 3
flash_point_f
Not applicable
flash_point_c
Not applicable
ppe
Eyeshields, Gloves, type N95 (US)
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Dokumenty związane z niedawno zakupionymi produktami zostały zamieszczone w Bibliotece dokumentów.
Comparison of two methods of preparing enzyme-antibody conjugates: application of these conjugates for enzyme immunoassay.
M J O'Sullivan et al.
Analytical biochemistry, 100(1), 100-108 (1979-11-15)
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
K Kato et al.
European journal of biochemistry, 62(2), 285-292 (1976-02-16)
Rabbit immunoglobulin G (IgG) was reduced by incubating with 10 mM 2-mercaptoethylamine and then treated with excess amounts of N,N'-o-phenylenedimaleimide. As a result, maleimide residues were introduced into rabbit IgG molecules. Rabbit IgG containing maleimide residues could be coupled to
M Takeyama et al.
Chemical & pharmaceutical bulletin, 40(8), 2199-2201 (1992-08-01)
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
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
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I have already bought this one. My question is how will I reconstitute it? What diluent or buffer will I use?
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