Experimentally measured phonon spectrum of microtubules

摘要: Microtubules are self-assembled protein cylinders with important mechanical roles inside living cells. Here we present an experimental method to measure the transversal collective dynamic modes of taxol stabilized microtubules in vitro. We treat microtubule as a lattice particles interacting harmonic potentials and use Fourier decomposition shape under excitation from thermal energy. report phonon spectrum due these MHz frequencies sound velocity is order mm s−1.