Internal states of active inclusions and the dynamics of an active membrane.
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.
Chen
Hsuan-Yi
HY
Department of Physics and Center for Complex Systems, National Central University, Chungli, 32054 Taiwan.
D002462:Cell Membrane / Q000737:chemistry / Q000502:physiology*; D008055:Lipids / Q000737:chemistry / Q000502:physiology*; D008565:Membrane Proteins / Q000737:chemistry / Q000502:physiology*; D008954:Models, Biological
D008055:Lipids; D008565:Membrane Proteins