Open Journal of Biophysics

Volume 5, Issue 3 (July 2015)

ISSN Print: 2164-5388   ISSN Online: 2164-5396

Google-based Impact Factor: 1.41  Citations  

Free Volume in Membranes: Viscosity or Tension?

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DOI: 10.4236/ojbiphy.2015.53007    4,682 Downloads   5,859 Views  Citations
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ABSTRACT

Many papers have used fluorescent probe diffusion to infer membrane viscosity but the measurement is actually an assay of the free volume of the membrane. The free volume is also related to the membrane tension. Thus, changes in probe mobility refer equally well to changes in membrane tension. In complicated structures like cell membranes, it appears more intuitive to consider variations in free volume as referring to the effect of domains structures and interactions with the cytoskeleton than changes in viscosity since tension is a state variable and viscosity is not.

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Markin, V. and Sachs, F. (2015) Free Volume in Membranes: Viscosity or Tension?. Open Journal of Biophysics, 5, 80-83. doi: 10.4236/ojbiphy.2015.53007.

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