METHOD OF PRODUCING PEPTIDE MIXTURE, METHOD OF PRODUCING FERMENTED MILK CONTAINING ANTIHYPERTENSIVE PEPTIDE AND METHOD OF PRODUCING ANTIHYPERTENSIVE PEPTIDE PREPARATION

摘要

It is intended to provide a method whereby a peptide mixture containing IPP and/or VPP at a high concentration, a fermented milk containing an antihypertensive peptide and a preparation thereof can be produced at a high efficiency. The above method of producing a peptide mixture or a fermented milk containing an antihypertensive peptide, which comprises the step (1-A) of preparing a mixture material (a) comprising a protein having the amino acid sequence of an antihypertensive peptide, a lactic acid bacterium-fermentable saccharide and a lactic acid bacterium, and the step (1-B) of fermenting the mixture material (a) under stirring and controlling the pH value with an alkali agent to thereby form the antihypertensive peptide and so on, is characterized in that the weight ratio of the a lactic acid bacterium-fermentable saccharide to the protein in the mixture material (a) is adjusted to 1.53 or more and the pH value is controlled to 4.8 to 5.8 in the step (1-B).