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The universal chain-induced interaction potential 
for a pair of bound myosins at separation x in units of the persistence length. Ticks on the x-axis denote binding sites on actin for a persistence length of five actin sites (ν = 5). The interaction is attractive (V(2)(x) < 0) almost everywhere, because the energy of two isolated kinks has been subtracted. A closed analytic formula is available (Smith, 2001).
