METHOD FOR PRODUCING AMINO ACID-RICH YEAST
The present invention provides: a method for producing an amino acid-rich yeast containing free amino acid in high concentration; a method for producing an amino acid-rich yeast, which includes liquid-culturing a yeast in a stationary phase of proliferation wherein the pH of a liquid medium is ≧7.5 and <11; a method for producing an amino acid-rich yeast, which includes adjusting the pH of the liquid medium to ≧7.5 and <11, and further culturing the yeast in this pH range; a method for producing an amino acid-rich yeast, wherein the yeast is Saccharomyces cerevisiae or Candida utilis ; an amino acid-rich yeast obtained by any one of the above methods; the amino acid-rich yeast extract wherein the amount of a free amino acid is from 7.5 to 18.0% by weight per dry yeast cell; and an amino acid-rich yeast extract extracted from the above amino acid-rich yeast.
1 . A method for producing an amino acid-rich yeast, comprising: liquid-culturing a yeast in a stationary phase of proliferation under the condition that the pH of a liquid medium is equal to or higher than 7.5 and lower than 11.
2 . The method for producing an amino acid-rich yeast according to claim 1 , wherein the liquid-culturing comprises:
adjusting the pH of a liquid medium of the yeast in a stationary phase of proliferation to equal to or higher than 7.5 and lower than 11, and
culturing the yeast within the above pH range.
3 . The method for producing an amino acid-rich yeast according to claim 1 , wherein the yeast is Saccharomyces cerevisiae or Candida utilis.
4 . An amino acid-rich yeast obtained by the method for producing an amino acid-rich yeast according to claim 1 .
5 . The amino acid-rich yeast according to claim 4 , wherein the amount of a free amino acid is from 7.5 to 18.0% by weight per dry yeast cell.
6 . An amino acid-rich yeast extract extracted from the amino acid-rich yeast according to claim 4 .
7 . The amino acid-rich yeast extract according to claim 6 , wherein the amount of a free amino acid derived from the yeast is from 30 to 70% by weight on a dry weight basis.
8 . A seasoning composition comprising the amino acid-rich yeast extract according to claim 6 .
9 . An amino acid-containing food, comprising the amino acid-rich yeast according to claim 4 .
10 . An amino acid-containing food, comprising the amino acid-rich yeast extract according to claim 6 .
11 . An amino acid-containing food, comprising the seasoning composition according to claim 8 .
12 . An amino acid-containing drink, comprising the amino acid-rich yeast according to claim 4 .
13 . An amino acid-containing drink, comprising the amino acid-rich yeast extract according to claim 6 .
14 . An amino acid-containing drink, comprising the seasoning composition according to claim 8 .