Internal states of active inclusions and the dynamics of an active membrane

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Abstract

A theoretical model of a two-component fluid membrane containing lipids and two-state active inclusions is presented. This model predicts several nonequilibrium morphology transitions. (i) Active pumping of the inclusions can drive a long-wavelength undulation instability. (ii) Active excitation of the inclusions can induce aggregation of high-curvature excited inclusions. (iii) Active inclusion conformation changes can produce finite-size domains. The resulting steady state domain size depends on inclusion activities. For a stable membrane the height fluctuation spectrum in the long-wavelength limit is similar to previous studies which neglected the inclusion internal states.

Original languageEnglish
Pages (from-to)168101
Number of pages1
JournalPhysical Review Letters
Volume92
Issue number16
StatePublished - 23 Apr 2004

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