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Typical responses to (Z)-1-[2-(2-aminoethyl)-N-(2-ammonioethyl)amino]diazen-1-ium-1,2-diolate (DETA-NONOate) and effects of various antagonists on these responses. Each trace is representative of at least 10 similar applications performed on five or more independent neuronal preparations. PTIO, 2-phenyl-4,4,5,5-tetramethylimidazoline-1-oxyl 3-oxide; Hb, haemoglobin; Asc, ascorbate; Gad, gadolinium; VER, verapamil.
