Patent ID: 6905704

Claim:
A Peptide SY having the following physicochemical properties. (A) Molecular weight: 200 to 10,000 (measured by high-performance liquid chromatography: ASAHIPAK GS-320) (B) Melting point: Colored and decomposed at 138±3° C. (C) Solubility in solvents: Easily soluble in water, but almost insoluble in ethanol, acetone and hexane (D) Appearance: White or pale yellow powder (E) Liquid condition (pH): 4.0 to 6.0 (F) Components: water 1 to 5% w/w (normal-pressure, heat-drying method) protein 84 to 94% w/w (Micro-Kjeldahl method) lipid 0.5% w/w or less (Soxhlet extraction method) ash 4±2% w/w (direct ashing method) Na 1 to 3% w/w (atomic absorption spectrometry) (G) Physiological properties: Containing dipeptide Val-Tyr and having an ACE-inhibiting activity (H) Infrared absorption spectrum: FIG. 3 (I) Ultraviolet absorption spectrum: FIG. 4 .