The force field (details in Section S2) is based on bond-130 ing, angular, torsional and excluded volume terms, and has a 131 potential energy form 132 𝐸 = 𝐸 bond + 𝐸 angle + 𝐸torsion + 𝐸 excl.vol. , [1] where 𝐸 bond and 𝐸 angle are harmonic forces and 𝐸torsion is 133 the periodic torsion force. The above terms are the defined 134 forces in OpenMM. 𝐸 excl.vol. is a custom force term defined 135 such that there is a penalty for bead overlap,