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Research (Published online: 15-05-2015)

11. Isolation and purification of beta-lactoglobulin from cow milk - Ranjit Aich, Subhasis Batabyal and Siddhartha Narayan Joardar

Veterinary World, 8(5): 621-624

 

 

   doi: 10.14202/vetworld.2015.621-624

 

Ranjit Aich: Department of Veterinary Biochemistry, Faculty of Veterinary and Animal Sciences, West Bengal University of Animal and Fishery Sciences, Belgachia - 700 037, Kolkata, India; Department of Veterinary Biochemistry, College of Veterinary Science and Animal Husbandry, Mhow - 453 446, Madhya Pradesh, India; aich80@gmail.com

Subhasis Batabyal: Department of Veterinary Biochemistry, Faculty of Veterinary and Animal Sciences, West Bengal University of Animal and Fishery Sciences, Belgachia - 700 037, Kolkata, India; batabyals2009@gmail.com

Siddhartha Narayan Joardar: Department of Veterinary Microbiology, Faculty of Veterinary and Animal Sciences, West Bengal University of Animal and Fishery Sciences, Belgachia - 700 037, Kolkata, India; joardar69@gmail.com

 

Received: 04-01-2015, Revised: 10-04-2015, Accepted: 16-04-2015, Published online: 15-05-2015

 

Corresponding author: Siddhartha Narayan Joardar, e-mail: joardar69@gmail.com


Citation: Aich R, Batabyal S, Joardar SN (2015) Isolation and purification of beta-lactoglobulin from cow milk, Veterinary World, 8(5):621-624.



Aim: The present study was undertaken to standardize a convenient method for isolation and purification of β-lactoglobulin (β-lg) from cow milk keeping its antigenicity intact, so that the purified β-lg can be used for detection of cow milk protein intolerance (CMPI).

Materials and Methods: Raw milk was collected from Gir breed of cattle reared in Haringhata Farm, West Bengal. Milk was then converted to skimmed milk by removing fat globules and casein protein was removed by acidification to pH 4.6 by adding 3 M HCl. β-lg was isolated by gel filtration chromatography using Sephacryl S-200 from the supernatant whey protein fraction. Further, β-lg was purified by anion-exchange chromatography in diethylaminoethyl-sepharose. Molecular weight of the purified cattle β-lg was determined by 15 percent one-dimensional sodium dodecyl sulfate-polyacrylamide gel electrophoresis and was analyzed by gel documentation system using standard molecular weight marker.

Results: The molecular weight of the purified cattle β-lg was detected as 17.44 kDa. The isolated β-lg was almost in pure form as the molecular weight of purified β-lg monomer is 18kDa.

Conclusion: The study revealed a simple and suitable method for isolation of β-lg from whey protein in pure form which may be used for detection of CMPI.

Keywords: beta-lactoglobulin, ion-exchange chromatography, milk protein intolerance, sodium dodecyl sulfate polyacrylamide gel electrophoresis, whey protein.



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