Figure 10.

Relaxed and deformed DNA discontinuous double helix. The inter-monomer spacing increases linearly (piecewise) from 0% strain at L = 0 to 9.8% at L = 174.93 Å. Relaxed versus stretched X-ray diffraction patterns are shown for (a) Ψ = 0 and (b) averaged over all values of Ψ. (c) Zoomed-out X-ray pattern from part (a), showing higher-order (second and third) meridional reflections. (d) Comparison of the meridional local profiles in the vicinity of the zeroth- to third-order reflections; black lines denote the relaxed helix and red lines the stretched.