A schizophrenia-associated protein; a gene coding for the protein; a method of diagnosing schizophrenia or schizoid abnormality on the basis of the intracerebral expression level of the gene coding for schizophrenia-associated protein as an indicator; a kit for the diagnosis; a method of screening a preventive/therapeutic agent for schizophrenia or schizoid abnormality on the basis of the effect in lowering the expression level of the gene coding for schizophrenia-associated protein as an indicator; and a kit for the screening. In particular, a schizophrenia-associated protein consisting of an amino acid sequence of SEQ ID No. 2, 4, 6 or 8, or an amino acid sequence of SEQ ID No. 2, 4, 6 or 8 wherein one or two or more amino acids have been deleted, substituted or added, wherein the fundamental intracerebral expression level is decreased dependently upon growth.
SCHIZOPHRENIA-ASSOCIATED PROTEIN AND GENE CODING FOR THE SAME