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              Open Access  
Copyright: The authors. This article is an open access 
article licensed under the terms of the Creative Commons Attribution License 
 
 
(http://creativecommons.org/licenses/by/2.0) which permits unrestricted use, 
distribution and reproduction in any medium, provided the work is properly 
cited. 
 
              
              
              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. 
 
              Abstract 
 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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