Electron paramagnetic resonance (EPR) spectra of the NO radical generated during the decomposition of S-nitrosocysteamine (CANO) using 0.5 mol/L nitroethane (NE) in 1.0 mol/L NaOH solution as the spin trap. (A) 0.5 mol/L NE, (B) 0.01 mol/L NO2−, (C) 0.04 mol/L cysteamine hydrochloride (CA), (D) [CANO] = 0.01 mol/L, (E) [CANO] = 0.02 mol/L, (F) [CANO] = 0.03 mol/L, and (G) [CANO] = 0.04 mol/L.