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The effects of a 24-h treatment with the potassium channel inhibitors tetraethylammonium (a), 4-aminopyridine (b), and quinine (c) on NO production and cellular viability of B10-4(S) macrophage-like cells activated with 1 μg/ml lipopolysaccharide (LPS) and 25 U/ml IFN-γ. *P < 0.05. ▪, NO production; □, respiration.
