J. Phys. II France
Volume 2, Numéro 5, May 1992
Page(s) 1273 - 1285
DOI: 10.1051/jp2:1992199
J. Phys. II France 2 (1992) 1273-1285

Theoretical and phase contrast microscopic eigenmode analysis of erythrocyte flicker : amplitudes

Mark A. Peterson1, Helmut Strey2 and Erich Sackmann2

1  Mount Holyoke College, South Hadley, MA 01075, U.S.A.
2  TU-Munchen, Physik-Department E22, 8046 Garching, Germany

(Received 26 July 1991, accepted 23 December 1991)

The energy eigenmodes of an erythrocyte with elastic properties described by a curvature modulus $k_{\rm c}$ and a shear modulus $\mu$ are computed, both for fixed spontaneous curvature c0, and in the bilayer coupling hypothesis (fixed $\langle H\rangle$). The corresponding thickness fluctuation profiles depend on the relative importance of $k_{\rm c}$ and $\mu$. A phase contrast microscopy determination of the thickness fluctuation profile indicates that $\mu$, at least in this process, is very small. The data favor fixed $\langle H\rangle$ over fixed c0. kc is about $4.3\times 10^{-19}$ J if c0 fixed and $1.4\times 10^{-19}$ J if $\langle H\rangle$ is fixed.

82.65D - 87.20 - 87.10

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