PMID: 3772016Aug 1, 1986Paper

Pyronin G as a fluorescent probe for quantitative determination of the membrane potential of mitochondria

Journal of Biochemical and Biophysical Methods
T Tomov


Added to mitochondrial suspension, pyronin G changes the intensity of its fluorescence depending on the membrane potential (energy state) of the mitochondria. The mechanism of this effect is studied and a dependence is obtained between the membrane potential and the fluorescence intensity. This permits quantitative determination of the membrane potential by the changes in the fluorescence of the suspension. A method is proposed for measuring the membrane potential of vesicles in the -120 to -220 mV interval.


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