Used in neuroscience research to quantify levels of tau protein in biological samples such as cerebrospinal fluid, brain tissue homogenates, or cell culture supernatants. Helps in studying neurodegenerative diseases like Alzheimer's disease and other tauopathies by measuring total tau or phosphorylated tau forms. Enables researchers to assess neuronal damage, monitor disease progression, and evaluate the efficacy of therapeutic agents targeting tau pathology. Widely applied in preclinical studies, biomarker validation, and drug development workflows.