FIELD: biotechnologies.
SUBSTANCE: alternative methods are proposed to produce a yeast extract to give taste of "kokumi" to food products, containing peptide γ-Glu-X or γ-Glu-X-Gly. One version of proposed methods includes growing of yeast in a nutrient medium containing peptide selected from the group that consists of γ-Glu-X, γ-Glu-X-Gly and X-Gly, and preparation of the yeast extract from the produced cells. Another version includes interaction of γ-glutamiltransferase on the yeast extract containing X or X-Gly, produced from yeast grown in the nutrient medium, to which amino acid X or peptide X-Gly is added. X is an amino acid or its derivative, different from Cys and its derivatives. The yeast extract is described to give "kokumi" taste to food products and produced by the specified methods, containing peptide selected from the group that consists of γ-Glu-X and γ-Glu-X-Gly, in the amount of 0.005% or more of dry weight of the yeast extract, differing by the fact that X is amino acid or its derivative, different from Cys and its derivatives.
EFFECT: invention makes it possible to produce a yeast extract with improved properties.
24 cl, 8 dwg, 14 tbl, 13 ex
