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Improving the Martini model: coarse-graining with dynamic charges and polarization

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While successfully reproducing hydrophobic and hydrophilic interactions the Martini model is insufficient to keep a protein folded as it lacks electrostatic interactions. Using split charge equilibration at each time step can yield realistic dynamic bead charges. Combining this with a Drude oscillator based polarization model for all beads will permit modeling of hydrogen bonds to maintain secondary protein structure and will enable more accurate coarse-grained simulations of protein-protein and protein-membrane interactions.