Patent ID: 7893203

Claim:
An isolated protein comprising any amino acid sequence selected from the group consisting of: (a) the amino acid sequence represented by SEQ ID NO:1; (b) an amino acid sequence of a protein involved in a G protein-coupled receptor mediated signal transduction, wherein the protein has an ability to mediate a signal transduction from a dopamine D1 receptor or an adenosine A2a receptor to an adenylate cyclase, and wherein the amino acid sequence has a homology of 85% or more with the amino acid sequence represented by SEQ ID NO:1 and retains the amino acid sequences represented by amino acid Nos. 119 to 133, 287 to 292, 353 to 359 and 428 to 435 in the amino acid sequence of SEQ ID NO:1; (c) the amino acid sequence represented by SEQ ID NO:25; and (d) the amino acid sequence represented by SEQ ID NO:26.