Hemagglutinin (influenza)
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Influenza hemagglutinin or haemagglutinin is a homotrimeric glycoprotein found on the surface of influenza viruses and is integral to its infectivity.
PDB 1hgd EBI
x-ray structure of the haemagglutinin-esterase-fusion glycoprotein of influenza c virus
Structure of influenza, showing neuraminidase marked as NA and hemagglutinin as HA.
Influenza A virus
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Influenza A virus, or IAV, is a pathogen with strains that cause seasonal flu in humans; it can also infect birds and some mammals. Strains of IAV circulate constantly in bats, pigs, horses, and dogs,
Hemagglutinin (influenza)
…comes from the protein's ability to cause red blood cells (i.e., erythrocytes) to clump together (i.e., agglutinate) in vitro. Hemagglutinin (HA) in influenza A virus (IAV) has at least 18 different subtypes. These subtypes are named H1 through H18. H16 was discovered in 2004 on IAVs isolated from black-headed gulls…
Influenza A late passage
SEM image of influenza A virions infecting ciliated cells of human nasal epithelial organoid
Genetic evolution of human and swine influenza viruses, 1918–2009