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L0130

Sigma-Aldrich

β-Lactoglobulin from bovine milk

≥90% (PAGE), lyophilized powder

Synonym(s):

β-LG, Bos d 5, beta-LG

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About This Item

CAS Number:
EC Number:
MDL number:
UNSPSC Code:
12352202
NACRES:
NA.61

biological source

bovine milk

Assay

≥90% (PAGE)

form

lyophilized powder

UniProt accession no.

storage temp.

2-8°C

Gene Information

bovine ... LGB(280838)

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General description

A member of the lipocalin family, β-Lactoglobulin (βLg) is a small protein of 162 amino acids with a molecular mass of ∼18,400 Da. It features an eight-stranded β-barrel (strands A-H) succeeded by a three-turn a-helix and a final β-strand (strand I) that forms part of the dimerization interface.
Milk from dairy cows contains the protein β-lactoglobulin (BLG). It naturally occurs in a number of genetic variants, and the most prevalent bovine variants are BLG A and BLG B.

Application

β-Lactoglobulin from bovine milk was used to test the allergen-responsive CD4+ CD25+ regulatory T cells in children who have outgrown cow′s milk allergy. It is also used to test the competitive displacement of β-lactoglobulin by Tween 20 from oil-water and air-water interfaces.

Other Notes

Contains β-lactoglobulins A and B which can be isolated chromatographically.

Quality

May not contain folate binding protein; not recommended for folate analysis.

Preparation Note

Crystallized

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’.

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A Heinzmann et al.
International archives of allergy and immunology, 120(4), 280-286 (2000-01-21)
beta-Lactoglobulin (BLG) represents one of the major allergens causing cow's milk allergy (CMA) - a disease with a wide spectrum of clinical symptoms. The aim of this study was to evaluate sequential B cell epitopes of BLG by the Pin-ELISA
The Competitive Displacement of ?-Lactoglobulin by Tween 20 from Oil-Water and Air-Water Interfaces
Peter J. Wilde, David C. Clark
Journal of Colloid and Interface Science, 155, 48-54 (1993)
Rachana Pathak et al.
European biophysics journal : EBJ, 51(4-5), 335-352 (2022-05-17)
Amyloid crystals, a form of ordered protein aggregates documented relatively recently, have not been studied as extensively as amyloid fibres. This study investigates the formation of amyloid crystals with low frequency ultrasound (20 kHz) using β-lactoglobulin, as a model protein for
André C Dumetz et al.
Biophysical journal, 94(2), 570-583 (2007-12-28)
The aggregates and gels commonly observed during protein crystallization have generally been considered disordered phases without further characterization. Here their physical nature is addressed by investigating protein salting-out in ammonium sulfate and sodium chloride for six proteins (ovalbumin, ribonuclease A
Isabella Pali-Schöll et al.
Clinical and translational allergy, 12(2), e12125-e12125 (2022-02-17)
Growing up on a cattle farm and consuming raw cow's milk protects against asthma and allergies. We expect a cattle-specific protein as active component in this farm effect. Dust was collected from cattle and poultry stables and from mattresses of

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