DiBAC4(3)(Bis-(1,3-Dibarbituricacid)-trimethineoxanol)isaso-calledtranslationalmembranepotentialdyethatredistributeswithinthecellmembranewhenmembranepotentialchanges(1,2).Thefluorescenceofthedyeisenhancedwhenthedyeentersthecellmembraneasaresultofmembranedepolarization.Therateoffluorescenceresponseofthedyetomembranepotentialchangeisusuallyslowerthanthatofthestyryldyedi-4-ANEPPS,butthefluorescencesignalchangefortheformerissignificantlylargerthanforthelatterdye.DiBAC4(3)hasapplicationsinhigh-throughputdrugscreening.
1.ChemPhysLipids69,137(1994).
2.BiochimBiophysActa771,208(1984).
3.JBiomolScreening1(2),75(1996).
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