Skip to Content
Merck
All Photos(1)

Documents

G4142

Sigma-Aldrich

β-Galactosidase from bovine testes

ammonium sulfate suspension, 1.0-3.0 units/mg protein (modified Warburg-Christian)

Synonym(s):

β-D-Galactoside galactohydrolase

Sign Into View Organizational & Contract Pricing
All Photos(1)

About This Item

CAS Number:
9031-11-2
Enzyme Commission number:
3.2.1.23 (BRENDA, IUBMB)
EC Number:
232-864-1
MDL number:
MFCD00130623
UNSPSC Code:
12352204
NACRES:
NA.54

biological source

bovine

form

ammonium sulfate suspension

specific activity

1.0-3.0 units/mg protein (modified Warburg-Christian)

foreign activity

α- and β-glucosidase ≤0.2%
α-fucosidase ≤0.2%
α-galactosidase ≤0.2%
α-mannosidase ≤0.2%
β-N-acetylglucosaminidase ≤1.0%

storage temp.

2-8°C

Application

β-Galactosidase from bovine testes was used for coupling to Sepharose.

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.

Unit Definition

One unit will hydrolyze 1.0 μmole of p-nitrophenyl β-D-galactopyranoside to p-nitrophenol and D-galactopyranose per min at pH 4.4 at 25 °C.

Physical form

Suspension in 3.2 M (NH4)2SO4, pH approx. 5.0

inhibitor

Product No.
Description
Pricing

substrate

Product No.
Description
Pricing

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

Already Own This Product?

Find documentation for the products that you have recently purchased in the Document Library.

Visit the Document Library

W Kiess et al.
The Journal of biological chemistry, 263(19), 9339-9344 (1988-07-05)
Cloning and sequencing of the human type II insulin-like growth factor (IGF) receptor cDNA revealed an 80% deduced amino acid sequence homology with the bovine cation-independent mannose 6-phosphate (Man-6-P) receptor, suggesting identity of the two receptors (Morgan, D. O., Edman
The purification and properties of beta-galactosidase from bovine testes.
J J Distler et al.
The Journal of biological chemistry, 248(19), 6772-6780 (1973-10-10)
D H Juers et al.
Protein science : a publication of the Protein Society, 8(1), 122-136 (1999-04-21)
Beta-galactosidase (lacZ) from Escherichia coli is a 464 kDa homotetramer. Each subunit consists of five domains, the third being an alpha/beta barrel that contains most of the active site residues. A comparison is made between each of the domains and
Yiquan Zhang et al.
Future microbiology, 8(2), 271-280 (2013-02-05)
To explore the transcriptional regulation of the psaEF and psaABC loci by the RovA and PhoP regulators in Yersinia pestis. Primer extension, LacZ fusion, gel mobility shift and DNase I footprinting assays were conducted in combination for this gene regulation
Javier A Menendez et al.
Cell cycle (Georgetown, Tex.), 12(4), 555-578 (2013-02-02)
Aging can be viewed as a quasi-programmed phenomenon driven by the overactivation of the nutrient-sensing mTOR gerogene. mTOR-driven aging can be triggered or accelerated by a decline or loss of responsiveness to activation of the energy-sensing protein AMPK, a critical
View All Related Papers

Articles

How to Work with Enzymes Supplied as Ammonium Sulfate Suspensions

Instructions for working with enzymes supplied as ammonium sulfate suspensions

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service