Before revision:  We used a structural homology modeling approach to characterize the SARSCoV2 spike protein and predict its binding strength to the human ACE2 receptor. We then explored the possible transmission path by which SARSCoV2 might have crossed to humans by constructing models of ACE2 receptors of relevant species, and calculating the binding energy of SARSCoV2 spike protein to each.
After revision:  We used a structural homology modeling approach to characterize the SARSCoV2 spike protein and predict its binding strength to the human ACE2 ) from multiple species. Human ACE2 receptors of relevant species, and calculating the binding energy of SARSCoV2 spike protein to each.