title: Brownian motion in biological membranes.
abstract: Brownian motion (diffusion) of particles in membranes occurs in a highly anisotropic environment. For such particles a translational mobility (independent of velocity) can be defined if the viscosity of the liquid embedding the membrane is taken into account. The results of a model calculation are presented. They suggest that for a realistic situation translational diffusion should be about four times faster in relation to rotational diffusion than in the isotropic case.
mesh_terms: D000818:Animals; D001001:Anura; D001692:Biological Transport; D002462:Cell Membrane / Q000378:metabolism; D004058:Diffusion; D008433:Mathematics; D008566:Membranes / Q000378:metabolism*; D008954:Models, Biological; D010786:Photoreceptor Cells / Q000378:metabolism; D011487:Protein Conformation; D012243:Rhodopsin / Q000378:metabolism; D014783:Viscosity
chemical_list: D012243:Rhodopsin