A bead attached to a cell surface by a short DNA tether is filmed inside a living…
PHYSICS · Subjective · Fermi University Physics · Thermal, Statistical & Complex Systems · Biophysics & Medical Physics · Physical foundations of the living cell
Forces, Machines and Signals, Ch Numbers and noise in a small system
Problem
A bead attached to a cell surface by a short DNA tether is filmed inside a living tissue at body temperature, 310K, and found to fluctuate with an rms amplitude of 12nm. Assume the tether acts as a Hookean spring and equipartition holds. Find its stiffness κ.