Figure 13.3 — Probing DNA thermal fluctuations Figure 13.3 — Probing DNA thermal fluctuations. (a) Experimental configuration to observe thermal force fluctuations in a single DNA molecule and (b) corresponding model.Reprinted figure from Meiners and Quake, Phys. Rev. Lett. 84, 5014–17. Copyright (2000) by the American Physical Society.