Co-oxidation of the sulfur-containing amino acids in an autoxidizing lipid system
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Abstract
Oxidation of the sulfur amino acids by autoxidizing lipids was studied in a model system consisting of an amino acid dispersed in cold-pressed, molecularly distilled menhaden oil (20–80% w/w). Under all conditions investigated, cysteine was oxidized completely to cystine. Preliminary results suggest that at 110°C the oxidation follows first-order kinetics for at least the first 8 hr. A specific reaction rate constant of 0.25 per hour was calculated. When fatty acids were added to the system, cystine was oxidized to its thiosulfinate ester. When the fatty acid-cystine ratio was 1:2, oxidation of cystine was a maximum. No oxidation of cystine occurred unless either a fatty acid, volatile organic acid, or ethanol was added. Under the conditions investigated, methionine was not oxidized to either its sulfoxide or its sulfone.
Suggested Citation
Wedemeyer, G., Dollar, A., 1963, Co-oxidation of the sulfur-containing amino acids in an autoxidizing lipid system: Journal of Food Science, v. 28, no. 5, p. 537-540, https://doi.org/10.1111/j.1365-2621.1963.tb00239.x.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Co-oxidation of the sulfur-containing amino acids in an autoxidizing lipid system |
| Series title | Journal of Food Science |
| DOI | 10.1111/j.1365-2621.1963.tb00239.x |
| Volume | 28 |
| Issue | 5 |
| Publication Date | August 25, 2006 |
| Year Published | 1963 |
| Language | English |
| Publisher | Wiley |
| Contributing office(s) | Western Fisheries Research Center |
| Description | 4 p. |
| First page | 537 |
| Last page | 540 |
| Online Only (Y/N) | N |
| Additional Online Files (Y/N) | N |