The ImmunoStar VIAAT antiserum was quality control tested using standard immunohistochemical methods in rat brain and spinal cord using biotin/avidin-HRP techniques.Specificity of the antiserum was demonstrated by soluble pre-adsorption and Western blot. Tissue staining is completely eliminated by pretreatment of the diluted antibody with an excess of rat VIAAT peptide residues 511-525. Western blot analysis of immunoprecipitated rat brain homogenates demonstrates a dense immunoreactive band of approximately 57 kD and a minor band of approximately 36 kD.