Fraction of potassium ions in cytosol that need flow out in order to alter the membrane potential by 100mV

Value 1E-05 Of intracellular K+ ions
Organism Generic
Reference Alberts, Molecular biology of the cell, 3rd edition, 1994, chapter 11, p.527 fig. 11-19
Method For a typical cell 1 microcoulomb of charge (6×10^12 univalent ions) per square centimeter of membrane, transferred from one side of the membrane to the other, will change the membrane potential by roughly 1 V. This means, e.g., that in a spherical cell of diameter of 10µm, the number of K+ ions that have to flow out to alter the membrane potential by 100mV is only ~1/100,000 of the total number of K+ ions in the cytosol
Entered by Uri M
ID 106433