| 摘要 |
PROBLEM TO BE SOLVED: To obtain a polypeptide mixture usable in fields of a food, a cosmetic, a medicine and the like, and further to obtain an emulsifier and to provide its production method. SOLUTION: This polypeptide mixture contains >=20% polypeptide derived from soybean glycinin based on a crude protein, and consists essentially of a protein having an N-terminal amino acid sequence of the formula; Phe-Leu- Glu-His-Ala-and about 9,000 molecular weight (measured by SDS-polyacrylamide electrophoresis). The method for producing the polypeptide mixture comprises concentration of the polypeptide to a concentration of >=20% of the crude protein by fractionating the polypeptide formed by subjecting the soybean glycinin to degradation by protease and having the N-terminal amino acid sequence of the formula; Phe-Leu-Glu-His-Ala-and about 9,000 molecular weight (measured by SDS-polyacrylamide electrophoresis), at pH 4-6. |
