11. Glycoside hydrolase family 83 CAZY GH _ 83 includes enzymes with neuraminidase activity. 12. The designations H and N refer to specific viral proteins, hemagglutinin and neuraminidase . 13. Viral neuraminidase ( NA ) is another protein found on the surface of influenza. 14. Neuraminidase is an antigenic glycoprotein enzyme found on the surface of the influenza viruses.15. Moreover, they are effective against all neuraminidase subtypes and all strains of influenza. 16. It is the first in a new generation of flu treatments known as neuraminidase inhibitors. 17. It is a neuraminidase inhibitor and was developed by the Australian biotech firm Biota Holdings. 18. The hemagglutinin neuraminidase ( HN ) is involved with viral attachment and thus hemadsorption and hemagglutination. 19. On September 1, 2009, several new virus isolates were tested for neuraminidase inhibitor resistance. 20. Type A and B have two glycoproteins : hemagglutinin ( HA ) and neuraminidase ( NA ).