Used in neuroscience and sleep disorder research to quantify levels of orexin A in biological samples such as cerebrospinal fluid or brain tissue. Helps investigate the role of orexin signaling in conditions like narcolepsy, insomnia, and other sleep-wake regulation disorders. Also applied in studies exploring appetite control, energy homeostasis, and addiction, where orexin pathways are involved. The kit enables sensitive and specific detection, supporting both preclinical and clinical research.