Membrane potential

Range -50 and -300 mV
Organism Fungus
Reference van Eunen K et al., Measuring enzyme activities under standardized in vivo-like conditions for systems biology. FEBS J. 2010 Feb277(3):749-60. p.751 left column 2nd paragraphPubMed ID20067525
Primary Source [25] Blatt MR, Rodriguez-Navarro A, Slayman CL. Potassium-proton symport in Neurospora: kinetic control by pH and membrane potential. J Membr Biol. 1987 98(2):169-89. [26] Peña A, Uribe S, Pardo JP, Borbolla M. The use of a cyanine dye in measuring membrane potential in yeast. Arch Biochem Biophys. 1984 May 15 231(1):217-25 [27] Slayman CL. Electrical properties of Neurospora crassa. Respiration and the intracellular potential. J Gen Physiol. 1965 Sep49(1):93-116. [28] Bertl A, Bihler H, Reid JD, Kettner C, Slayman CL. Physiological characterization of the yeast plasma membrane outward rectifying K+ channel, DUK1 (TOK1), in situ. J Membr Biol. 1998 Mar 1 162(1):67-80.PubMed ID2959789, 6372694, 5862508, 9516239
Comments "If [investigators] assume only passive sodium transport, sodium should indeed accumulate intracellularly, owing to the membrane potential, which is negative inside. [They] calculated the plasma membrane potential that would be required to achieve the observed 140- fold accumulation, and obtained )128 mV. This seems a realistic value, as membrane potentials between -50 and -300 mV have been found for fungi [primary sources]."
Entered by Uri M
ID 107759