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Preliminary report on the nutritional significance of bound gossypol in cottonseed meal
Author(s) -
Baliga B. P.,
Lyman Carl M.
Publication year - 1957
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/bf02637931
Subject(s) - gossypol , cottonseed meal , cottonseed , lysine , chemistry , food science , biochemistry , meal , biology , amino acid , soybean meal , organic chemistry , raw material
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.