An antibody that agglutinates erythrocytes.
An important surface structure protein of the influenza virus that is an essential gene for the spread of the virus throughout the respiratory tract. This enables the virus to attach itself to a cell in the respiratory system and penetrate it. Referred to as the “H†in influenza viruses. See neuraminidase.
a molecule, such as an antibody or lectin, that agglutinates red blood cells.
A substance, antibody or other, that causes hemagglutination.
Flu viral surface protein involved in binding to the host cell.
Hemagglutinin (HA) or haemagglutinin (BE) is an antigenic glycoprotein found on the surface of the influenza viruses (as well as many other bacteria and viruses). It is responsible for binding the virus to the cell that is being infected. The name "hemagglutinin" comes from the protein's ability to cause erythrocytes to clump together in vitro (Nelson 2005).