A force balanced generalized molecular fractionation with conjugate caps (FB-GMFCC) method is proposed for ab initio molecular dynamic simulation of proteins. In this approach. the energy of the protein is computed by a linear combination of the QM energies of individual residues and molecular fragments that account for the two-body interaction of hydrogen bond between backbone peptid... https://www.roneverhart.com/Roland-Blues-Cube-Stage-1x12-60-Watt-Combo-Amp-p24291/