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Electrochemical response of [Ru(bpy)2(SO3)(NO)]+ (1 mM) in reactions with glutathione in 0.1 M phosphate buffer at a pH of 7.4, followed by square-wave voltammetry (glassy carbon as the working electrode and Ag|AgCl as the reference electrode, reductive sweep). (A) 10-fold molar excess of reduced glutathione (10 mM); (B) 2-fold excess of glutathione (2 mM), monitored for 30 min.
