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We present improved molecular mechanics models for perfluorocarbons and mixed hydro- and fluorocarbons, based on the GAFF2 force field. Benchmarking was performed for a series of single molecule geometries and for condensed phases, namely self-assembled monolayers comprising perfluoro-octadecane phosphonic acids. From this, considerable improvement of the torsion angles is demonstrated. Apart from...
We present a rare comparison of structures of the same protein but generated by different potentials. We used four popular water potentials (SPC, TIP3P, TIP4P, TIP5P) in conjunction with the equally popular ff99SB. However, the ff12SB protein potential was used with TI3P only. Simulations (60 ns) were run on the catabolite activator protein (CAP), which is a textbook case of allosteric interaction...
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