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The pH-induced conformational change of influenza virus hemagglutinin (HA) has been investigated by calculating the change of electrostatic energy of the fragment of HA2 upon pH change. The average charge and electrostatic free energy are calculated as a function of pH for the fusion peptide (residues 1–20 of HA2) and the polypeptide of residues 54–77 of HA2 by using the finite difference Poisson-Boltzmann...
We have compared force-induced unfolding with traditional unfolding methods using apomyoglobin as a model protein. Using molecular dynamics simulation, we have investigated the structural stability as a function of the degree of mechanical perturbation. Both anisotropic perturbation by stretching two terminal atoms and isotropic perturbation by increasing the radius of gyration of the protein show...
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