NOS1 (Nitric Oxide Synthase 1): NOS1 is an enzyme that produces nitric oxide (NO), a crucial signaling molecule in the body. It plays a vital role in neurotransmission, regulation of vascular tone, and modulation of immune responses. Within the nervous system, NOS1 facilitates neuronal communication and plasticity. Dysregulation of NOS1 activity has been associated with neurological disorders, cardiovascular diseases, and inflammatory conditions.