Simulations of chemical reaction in biomolecules (Hybrid QM/MM molecular dynamics) QM/MM Modeling Approach Historical Overview Historical Overview Hybrid computational schemes Termination of QM region Choice of QM model Choice of MM model Valence force fields Valence force fields Shell model force fields Choice of MM model Conventional QM/MM Scheme QM/MM Coupling QM/MM non-bonded interactions Mechanical embedding Electrostatic embedding Neutral charge embedding Neutral charge embedding Neutral charge embedding Neutral charge embedding Boundary adjustments Software implementation