title: Preparation and properties of the brain specific protein 14-3-2.
abstract: A brain specific protein, 14-3-2, has been isolated from bovine brain by the use of ammonium sulfate precipitation, gel filtration on Sephadex G-150, and ion exchange chromatography on DEAE-cellulose and DEAE-Sephadex. It is an acidic protein, in agreement with the high content of glutamic and aspartic acid, that is composed of a single polypeptide chain of mol. wt. 50,000. Immunochemical tests using antiserum to purified 14-3-2 showed that the protein is present in at least 100-fold greater amounts in brain than in any other rat tissue. Furthermore, 14-3-2 was found in brains of a number of vertebrate species, although the antigen is apparently not entirely identical in all species tested. The protein 14-3-2 can be considered to be a species non-specific protein which is neuronal in origin.
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001923:Brain Chemistry; D002417:Cattle; D002499:Centrifugation, Density Gradient; D002845:Chromatography; D004587:Electrophoresis, Agar Gel; D005779:Immunodiffusion; D009419:Nerve Tissue Proteins / Q000276:immunology / Q000302:isolation & purification*; D051381:Rats; D013045:Species Specificity
chemical_list: D009419:Nerve Tissue Proteins