EPR spectra of A) NPCuO (300 μM) and H2O2 (22.5 mM); B) NPCuO (300 μM), H2O2 (22.5 mM), and MEPCA (600 μM); C) NPCuO (300 μM), H2O2 (22.5 mM), and VA (600 μM); D) NPCuO (300 μM), H2O2 (22.5 mM), and EGC (600 μM); E) wCuO (300 μM) and H2O2 (22.5 mM); and (F) wCuO (300 μM), H2O2 (22.5 mM), and MEPCA (600 μM). All spectra were collected at room temperature and pH 7 (MOPS, 10 mM) with DMPO (30 mM) as a spin trap.