Template:Aquatic layer topics. An abyssal plain is an underwater plain on the deep ocean floor, usually found at depths between 3000 and 6000 m. Lying generally between the foot of a continental rise and a mid-ocean ridge, abyssal plains cover more than 50% of the Earth âs surface.
Murad discovered in 1977 that nitroglycerin and related artery-widening compounds act by releasing nitric oxide. Furchgott later concluded that cells in the inner lining of blood vessels secrete some unknown substance that makes vessels dilate.
âWeâve focused for many years on the nitric oxide pathway to find new therapies that might improve outcomes for babies with pulmonary hypertension,â Aschner said. In the body, the enzyme nitric oxide synthase (NOS) produces nitric oxide from the amino acid arginine. Aschner and colleagues had discovered that NOS is present in a multi-protein complex, which is important for the activation of NOS and production of nitric oxide.