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Researchers describe a method for investigating the
viscosity of lipid membranes. Tracers
consisting of two microspheres coupled to a specific lipid allowed measurements
of translational and rotational diffusion co-efficient and thus viscosity. The method showed that adding vesicle
trafficking protein Sar1p to membranes resulted in dramatic increase in
membrane viscosity.
Measuring Lipid Membrane Viscosity Using Rotational and
Translational Probe Diffusion; T.T. Hormel et al; Physical Review Letters; 112,
188101 (2014)
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