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. Author manuscript; available in PMC: 2010 Aug 15.
Published in final edited form as: Biochem Pharmacol. 2009 Apr 24;78(4):344–354. doi: 10.1016/j.bcp.2009.04.016

Figure 1. The dihalogenated benzoquinoneimine redox dye 2,6-dichlorophenolindophenol (DCPIP).

Figure 1

Reduction of the blue dye DCPIP (λmax = 600 nm) with formation of the colorless p-aminophenol hydroquinone leuco form occurs through enzymatic transformation by NAD(P)H quinone oxidoreductase (NQO1) or nonenzymatic reaction with reducing agents such as ascorbic acid.