Patent 7160570 was granted and assigned to AJINOMOTO CO., INC. on January, 2007 by the United States Patent and Trademark Office.
The present invention relates to a method for the manufacture of a food material containing high quantities of cysteine. In this method, a yeast extract is prepared from yeast cells that contains γ-glutamylcysteine and the extract is concentrated by controlling the temperature to be not greater than 60° C. to prepare a food material in a liquid form, wherein the concentration of solids is at least 10% and the resulting food material is maintained at 70 to 130° C.