Abstract
The effect of the cyclic tetrapeptide tentoxin, an energy transfer inhibitor which binds to the chloroplast coupling factor 1, on the light‐induced electric potential and the potential decay in the dark was investigated by means of microcapillary glass electrodes in single isolated chloroplasts of the higher plant Peperomia metallica Lind et Rodig. A proposed K+ carrier property of the toxin could not be observed neither in the light response nor in the dark decay of the membrane potential.
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