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Bar graphs depict the effects of H2O2 (40 μM) for one hour on extracellular levels of 5′-AMP (A), adenosine (C), inosine (E), and hypoxanthine (G) and intracellular levels of 5′-AMP (B), adenosine (D), inosine (F), and hypoxanthine (H) in neurons. Values represent mean ± SEM.
