Localized Topological Changes of the Plasma Membrane upon Exocytosis Visualized by Polarized Tirfm Jcb: Correction Jcb: Article

In the discussion of the polar coordinate system leading to Eq. (1), the azimuthal angle f is ambiguously defined as " measured around the z axis. " A more conventional precise definition is " measured around the z axis starting from the x axis. " With this standard definition, the expression for S in Eq. (1) should contain the factor sin 2 f instead of cos 2 f. (The factor cos 2 f is correct only if f is understood to be measured from the y axis.) All of the geometrical models considered in the paper are azimuthally isotropic, so the starting axis for measuring f makes no difference whatsoever in the subsequent analysis. Also, in the equation for orientational distribution h(plane), shown before Eq. (5), the delta function factor d(u 2 p/2) is best written as d(cosu). This makes no difference for the particular case here, but a d-function distribution at any general polar angle u o must be written as d(cosu 2 cosu o).