Mitochondrial membrane potentials
were measured by laser scanning microscopy and comparable results were obtained (Fig.
This K+ leakage is the main cause of the negative membrane potentials
in all neurons.
About 19 hours after fertilization of the frogs' eggs, the membrane potentials
of some cells in tadpoles' heads drop to about -20 millivolts, the researchers found.
In the presence of physiological mitochondrial membrane potentials
, JC-1 forms aggregates that fluoresce with an emission peak at 588 nm.
Our model predicts that 1) the polarity of the T wave is mostly determined by the difference between local membrane potential
and the average of all membrane potentials
in the ventricles.
The automated oocyte clamp design incorporates a number of existing Axon technologies, such as amplifiers and data acquisition systems for studying ionic currents and changes in membrane potentials
in a wide variety of cellular preparations.
Assuming that the membrane potentials
across the characean plasma membrane and vacuolar membrane are -0.
JC-1 is a dye that selectively enters into mitochondria and exhibits an intense red fluorescence in healthy mitochondria with normal membrane potentials
It is a cofactor for the activation of many enzymatic processes of cellular homeostasis, including the turnover of adenosine triphosphate (ATP) the energy source for contractility, maintenance of membrane potentials
, and the control of vascular tone (3-5).
Preliminary results suggested an effect of HQ on bean root cell membrane potentials
In the majority of the malignant cells we've looked at so far, that part of the process that makes it malignant appears to change the magnitude of the cell's membrane potentials
so they ingest much more, two to 10 times more, of the [positively charged] compound," Oseroff explains.
To test this hypothesis, we monitored membrane potentials
across root membranes of the common bean, Phaseolus vulgaris, exposed to acute applications of a range of HQ concentrations (0.