Preliminary report on the nutritional significance of bound gossypol in cottonseed meal |
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Authors: | B P Baliga Carl M Lyman |
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Affiliation: | (1) Department of Biochemistry and Nutrition, Texas Agricultural Experiment Station, A. and M. College of Texas System, College Station, Texas |
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Abstract: | Summary A procedure is described by which bound or inactivated gossypol can be removed from cottonseed meal without the application
of heat which might damage the protein. The removal of bound gossypol increased the nutritional value of the protein as determined
by chick feeding tests, rat protein-repletion tests, and lysine availability tests. A procedure is described for the preparation
of a gossypol-cottonseed protein complex without heating the materials. As a result of the combination of the protein with
gossypol, marked reduction in nutritional value occurred. The nitrogen solubility of the complex was only about half that
of the original protein. The results are in accord with the concept that the inactivation of gossypol during the processing
of cottonseed meal is accomplished through the formation of an insoluble, inert gossypol-protein complex which results not
only in rendering the gossypol harmless but also in the loss of part of the nutritional value of the protein. |
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