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  Indian J Med Microbiol
 

Figure 2: Crystal structure of the NA. The tetramer is composed of four identical monomers. The active site is located on top of the molecule (Xiaojin et al., 2008)

Figure 2: Crystal structure of the NA. The tetramer is composed of four identical monomers. The active site is located on top of the molecule (Xiaojin <i>et al</i>., 2008)