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hemagglutinin

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hemagglutinin /he·mag·glu·ti·nin/ (-gloo´tĭ-nin) an antibody that causes agglutination of erythrocytes.
cold hemagglutinin  one which acts only at temperatures near 4° C.
warm hemagglutinin  one which acts only at temperatures near 37° C.

he·mag·glu·ti·nin (hm-gltn-n)
n.
A substance that causes agglutination of red blood cells.

hemagglutinin
Etymology: Gk, haima + L, agglutinare
a type of antibody that agglutinates red blood cells. It is classified according to the source of cells agglutinated as autologous (from the same organism), homologous (from an organism of the same species), and xenogenic (from an organism of a different species). Some hemagglutinins clump red cells together as they are suspended in 0.85% sodium chloride solution; others will not agglutinate red cells unless hydrophilic colloids are added or unless the red cells have been treated with a proteolytic enzyme.

hemagglutinin [he″mah-gloo´tĭ-nin]
an antibody that causes agglutination of erythrocytes.
cold hemagglutinin one that acts optimally at temperatures near 4°C.
warm hemagglutinin one that acts optimally at temperatures near 37°C.

hemagglutinin
a substance that causes agglutination of erythrocytes. See hemagglutination.

cold hemagglutinin
one that acts only at temperatures near 39.2°F (4°C).
warm hemagglutinin
one that acts only at temperatures near 98.6°F (37°C).


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determining which one of the 16 different hemagglutinin and nine different neuraminidase proteins are expressed on the surface of the virus) is not done routinely.
However, binding efficiency varies between flu strains, and that variation is partly determined by the receptor-binding site (RBS) within the hemagglutinin protein.
All flu viruses have eight genes, including two that are coded to produce the proteins hemagglutinin (H) and neuraminidase (N) that allow the virus to enter a host cell and spread from cell to cell, the report said.
 
 
 
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