Importance

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Abstract

An excellent peptidyl peptidase-IV inhibitor and the like are provided. A peptide consisting of Val-Pro-X wherein X represents an amino acid residue (except for L-proline residue); the aforementioned X is preferably one selected from a basic amino acid residue, an aliphatic neutral amino acid residue, an amide group-carrying neutral amino acid residue, or an aromatic group-carrying neutral amino acid residue; the aforementioned X is preferably one selected from an alanine residue, a glutamine residue, a methionine residue, an asparagine residue, a glycine residue, a valine residue, a tyrosine residue, a serine residue, and a lysine residue; a dipeptidyl peptidase-IV inhibitor, a blood sugar rise suppressing agent, a vascular endothelial disorder suppressing agent, and an angiotensin converting enzyme inhibitor containing the aforementioned peptide as an active ingredient.

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First Claim