Used in biomedical research to measure enkephalin levels in tissue or biological fluid samples. Helps study pain regulation, stress response, and neurological disorders. Commonly applied in neuroscience, endocrinology, and pharmacology research to evaluate opioid peptide expression under various experimental conditions. Enables quantification of enkephalin in cell cultures, brain tissues, and cerebrospinal fluid. Supports drug development and mechanistic studies related to the body's natural pain modulation systems.