Abstract
The worm-like-chain (WLC) model is widely used to describe the energetics of DNA bending. However, for length scales much shorter than the persistence length the validity of a purely harmonic bending potential has been questioned by recent experiments. So-called sub-elastic chain (SEC) models were proposed that predict a lower elastic energy of highly bent DNA conformations. Until now, no unambiguous verification of these models has been obtained since probing the elasticity of DNA on short length scales remains challenging.
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