NEW PEPTIDE HAVING TASTE IMPROVING ACTION, PEPTIDE- CONTAINING SEASONING SOLUTION CONTAINING THE NEW PEPTIDE, METHOD FOR PRODUCING THE SAME AND METHOD FOR IMPROVING TASTE OF FOOD USING THE NEW PEPTIDE AND/OR THE PEPTIDE- CONTAINING SEASONING SOLUTION

摘要

PROBLEM TO BE SOLVED: To obtain a new peptide having an excellent taste improving function such as improving actions of body and flavor of food, a peptide-containing seasoning solution containing the new peptide and to provide both a method for efficiently producing the peptide-containing seasoning solution and a method for improving taste of food using the new peptide and/or the peptide-containing seasoning solution. SOLUTION: (1) This peptide comprises an amino acid sequence described by a sequence number 1 [Tyr Glu Glu Glu] or a sequence number 2 [Tyr Glu Glu Asp] and has taste improving action. (2) This peptide-containing seasoning solution is characterized in that the seasoning solution is a hydrolyzate of an extraction residue of dried fish and contains the peptide described in the article (1). (3) This method for producing a peptide-containing solution having a taste improving action comprises hydrolyzing an extraction residue of dried fish with a strongly alkaline protease derived from a bacterium belonging to the genus Bacillus at pH 4-6.5 for >=30 hours. This method for improving a taste of food comprises adding >=0.0005% (w/v) of the peptide to a food.