Fig. 1.

Docking of H7N9 neuraminidase protein to Neu5Ac receptor. a Neuraminidase of the H7N9 strain. b Neuraminidase of the H7N9 strain R to K292 mutant strain. The NAs of the classical and mutant H7N9 strains were depicted in white, whereas the Molsoft plot of the ligand was depicted as mutli-colour stick model inside the binding pocket of the neuraminidase proteins. The binding free energy was −61.49 in mutant strain but −66.80 in non mutant strain