L8005
β-Lactoglobulin B from bovine milk
≥90% (PAGE)
Synonym(s):
β-LG, Bos d 5, beta-LG
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About This Item
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biological source
bovine milk
Quality Level
Assay
≥90% (PAGE)
form
powder
mol wt
18,276 Da by calculation
technique(s)
HPLC: suitable
electrophoresis: suitable
UniProt accession no.
storage temp.
2-8°C
Gene Information
bovine ... LGB(280838)
General description
β-Lactoglobulin B (β-LG B), a isoform of β-Lactoglobulin, is a small protein of 162 amino acids with a molecular mass of 18.2 kDa and optimum pH of 5.2. It is present in high level in casein and is relatively low in raw bovine milk. β-LG has eight-stranded β-barrel (strands A-H) succeeded by a three-turn α-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 known as BLG A and BLG B.
Application
β-Lactoglobulin B from bovine milk has been used as:
- a protein standard in SDS-polyacrylamide electrophoresis for quantification of milk protein fractions
- in the calibration of reversed phase- high-performance liquid chromatography (HPLC) for caseins quantification
- for immobilization on the biosensor surface and a calibration standards in biosensor assay
β-Lactoglobulin was used in the identification of the genetic variants of κ-casein in milk by isoelectric focusing electrophoresis.
Biochem/physiol Actions
β-Lactoglobulin B (β-LG B) show less inhibitory effect on the Staphylaococcus sp compared to β-LG A.
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)
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Alessandro Nucara et al.
SpringerPlus, 2, 661-661 (2013-12-20)
The interaction between whey carrier protein β-lactoglobulin B and (-)-epicatechin, a major dietary flavonoid with a wide range of health-promoting biological activities, was investigated by Fourier transform infrared spectroscopy in physiological conditions. Amide I spectra of epicatechin - β-lactoglobulin complexes
Huaying Zhao et al.
Current protocols in protein science, 101(1), e109-e109 (2020-07-03)
Sedimentation velocity analytical ultracentrifugation is a powerful classical method to study protein self-association processes in solution based on the size-dependent macromolecular migration in the centrifugal field. This technique can elucidate the assembly scheme, measure affinities ranging from picomolar to millimolar
Antimicrobial activity of bovine beta-lactoglobulin against mastitis-causing bacteria
Chaneton L, et al.
Journal of Dairy Science, 94(1), 138-145 (2011)
The beta-lactoglobulin content of bovine milk: Development and application of a biosensor immunoassay
Indyk HE, et al.
International dairy journal, 73, 68-73 (2017)
Analysis of alpha-lactalbumin, beta-lactoglobulin A and B in whey protein powder, colostrum, raw milk, and infant formula by CE and LC
Ding X, et al.
Dairy science & technology, 91(2), 213-225 (2011)
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