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The free energy of the incoming Aβ peptide ΔF(z) along the z axis coinciding with the fibril axis (Fig. 1a). ΔF(z) is obtained at Tl = 360 K. Two free energy minima reflect Aβ binding to the concave (CV) and convex (CX) fibril edges. Binding to CV is thermodynamically preferred. Free energy of the CV minimum is set to zero.
