Unravelling what governs the fluctuation spectra of active membranes

POSTER

Abstract

We detect thermal and activity-driven fluctuations of lipid vesicles over the exceptionally broad frequency range of 0.1 to 1,000 Hz with an amplitude resolution of 0.1 nm. Thermal fluctuations, understood phenomenologically from the classical Helfrich theory, are modified by active protein pumps to enhance high-frequency fluctuations. This enhancement yields surprises regarding underlying processes occurring in the membrane.

Presenters

  • Kisung Lee

    • Center for Soft and Living Matter, Institute for Basic Science

Authors

  • Kisung Lee

    • Center for Soft and Living Matter, Institute for Basic Science

  • Hyunsook Jang

    • Center for Soft and Living Matter, Institute for Basic Science

  • Kai Lou

    • Center for Soft and Living Matter, Institute for Basic Science

  • Steve Granick

    • Center for Soft and Living Matter, Institute for Basic Science (IBS)
    • Center for Soft and Living Matter, Institute for Basic Sciences
    • IBS Center for Soft and Living Matter
    • Center for Soft and Living Matter, Institute for Basic Science