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Key Documents

L2506

Sigma-Aldrich

β-Lactoglobulin from bovine milk

≥85% (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

Quality Level

assay

≥85% (PAGE)

form

lyophilized powder

technique(s)

titration: suitable

UniProt accession no.

storage temp.

2-8°C

Gene Information

bovine ... LGB(280838)

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General description

β-Lactoglobulin plays a key role in immune response and modulates IgM levels and cell proliferation. β-Lactoglobulin from bovine is a model system for protein folding studies and denaturation kinetics. Polymorphisms in the β-lactoglobulin modulates bovine milk production and composition.
A member of the lipocalin family, βLg is a small protein of 162 amino acids with a molecular mass of ∼18,400 Da,. It has 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 has been used:
  • for the generation of calibration curve for protein solubility index
  • in acid-base titration
  • as a standard for surface hydrophobicity analysis

β-Lactoglobulin was used in a cytologic assay for diagnosis of food hypersensitivity in patients with irritable bowel syndrome.

Quality

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

Storage Class

11 - Combustible Solids

wgk_germany

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Gloves, type N95 (US)


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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Comparison of protein surface hydrophobicity measured at various pH values using three different fluorescent probes
Alizadeh-Pasdar N and Li-Chan ECY
Journal of Agricultural and Food Chemistry, 48(2), 328-334 (2000)
beta-Lactoglobulin Influences Human Immunity and Promotes Cell Proliferation
Tai CS, et al
BioMed Research International, 2016 (2016)
Roles of electrostatic interaction and polymer structure in the binding of beta-lactoglobulin to anionic polyelectrolytes: measurement of binding constants by frontal analysis continuous capillary electrophoresis
Hattori T, et al.
Langmuir, 16(25), 9738-9743 (2000)
Polymorphism of Beta-Lactoglobulin Coding and 5?-Flanking Regions and Association with Milk Production Traits
Zakizadeh S, et al.
Biotechnology, Biotechnological Equipment, 26(1), 2716-2721 (2012)
Reversible unfolding of bovine beta-lactoglobulin mutants without a free thiol group
Yagi M, et al.
Test, 278(47), 47009-47015 (2003)

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