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Safety Information

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:
9045-23-2
EC Number:
232-928-9
MDL number:
MFCD00130635
UNSPSC Code:
12352202
NACRES:
NA.61

biological source

bovine milk

Quality Level

200

Assay

≥85% (PAGE)

form

lyophilized powder

technique(s)

titration: suitable

UniProt accession no.

P02754

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 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

Regulatory Listings

Regulatory Listings are mainly provided for chemical products. Only limited information can be provided here for non-chemical products. No entry means none of the components are listed. It is the user’s obligation to ensure the safe and legal use of the product.

JAN Code

L2506-5G:
L2506-1G:
L2506-BULK:
L2506-250MG:
L2506-VAR:

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Certificates of Analysis (COA)

Lot/Batch Number
0000385877
0000385877
SLCL9502
SLCG3099
SLCD1184

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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)
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)
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)
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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