Hi, I am planning to do a simulation with a pair of rigid linear rods in SPC/E water . More specifically, I want to calculate the free energy of association of a pair of rigid rod in water, using umbrella sampling. But, I was wondering how to keep a chain molecule, around 10-mer, rigid . I am not sure whether just constraining the bond lengths using LINCS will be good idea for stable simulation . But, not sure whether, the molecule will still be linear or not ? Any suggestion will be appreciated. Sanku
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