| 摘要 |
A yeast extract containing 0.2% or more of gamma-Glu-Abu based on dry weight of the yeast extract is produced by culturing a yeast, such as Saccharomyces cervisiae or Candida utilis, in a medium containing a compound selected from Abu (L-2-aminobutyric acid) and gamma-Glu-Abu (L-gamma-glutamyl-L-2-aminobutyric acid), and preparing a yeast extract from the obtained cells.
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