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Left: Force curves taken with a protein molecule composed of repeating Titin domains tethered to the cantilever. The red curve shows the experimental data and the purple shows the fits to the worm-like chain (WLC) model. The contour lengths (Lc) increase as each domain is unfolded. Right: Contour lengths vs. peak index for unzipping curves.

Data courtesy of J. Clarke, S. Fowler and A. Steward, Cambridge University, UK.


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