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Department of Food Science and Nutrition, The Ohio State University, Columbus 43210
ABSTRACT
Commercial IgG1, IgG2, and IgM bovine immunoglobulin fractions were relatively homogeneous by acid polyacrylamide gel-electrophoresis and immunoelectrophoresis. However, isoelectric focusing in polyacrylamide gels with ampholytes covering wide and narrow pH gradients revealed heterogeneity among IgGl and IgG2 species with estimated isoelectric points in the pH ranges of 5.5 to 6.8 and 7.5 to 8.3, respectively. IgM was not resolved by gel isoelectric focusing. IgGl and IgM were tentatively identified as the major and minor immunoglobulin components, respectively, of bovine colostrum whey.
1 Article 3:72. This investigation was supported by Public Health Services Grant FD-00161 from the Office of Research and Training Grants, Food and Drug Administration.
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