Patent ID: 7892755

Claim:
A method of screening a compound or a salt thereof that alters the binding property of a protein comprising the amino acid sequence of SEQ ID NO: 1, or a salt thereof, to a ligand selected from the group consisting of a quinoxaline-2,3-dione compound and ellagic acid, which comprises: (a) contacting said protein, or a salt thereof, with said ligand, and determining the binding amount of said ligand to said protein or a salt thereof; (b) contacting said protein or a salt thereof with said ligand and said compound, and determining the binding amount of said ligand to said protein or a salt thereof; and comparing the binding amounts amount of said ligand to said protein or a salt thereof in step (a) and with the binding amount of said ligand to said protein or a salt thereof in step (b); thereby identifying the compound that alters the binding property of the protein.