Influenza A H9N2 (A/Hong Kong/1073/99) Hemagglutinin / HA Protein (His Tag)

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Influenza A H9N2 (A/Hong Kong/1073/99) Hemagglutinin / HA Protein (His Tag): Product Information

Purity
> 97 % as determined by SDS-PAGE
Endotoxin
< 1.0 EU per μg of the protein as determined by the LAL method
Activity
Testing in progress
Protein Construction
A DNA sequence encoding the extracellular domain of Influenza A virus H9N2 hemagglutinin (Influenza A virus (A/Hong Kong/1073/99 (H9N2)) (NP_859037.1) (Met 1-Lys 523) (HA1+HA2, uncleaved) was fused with a polyhistidine tag at the C-terminus.
Accession#
Expressed Host
HEK293 Cells
Species
H9N2
Predicted N Terminal
Asp 19
Molecule Mass
The secreted recombinant hemagglutinin of Influenza A virus H9N2 (A/Hong Kong/1073/99) comprises 516 amino acids with the predicted molecular mass of 58 kDa. As a result of glycosylation, it migrates as an approximately 65-75 kDa band in SDS-PAGE under reducing conditions.
Formulation
Lyophilized from sterile PBS, pH 7.4
1. Normally 5 % - 8 % trehalose, mannitol and 0.01% Tween80 are added as protectants before lyophilization. Specific concentrations are included in the hardcopy of COA.
2. Please contact us for any concerns or special requirements.
Please refer to the specific buffer information in the hard copy of CoA.
Shipping
In general, recombinant proteins are provided as lyophilized powder which are shipped at ambient temperature.
Bulk packages of recombinant proteins are provided as frozen liquid. They are shipped out with blue ice unless customers require otherwise.
Stability & Storage
Samples are stable for up to twelve months from date of receipt at -20℃ to -80℃
Store it under sterile conditions at -20℃ to -80℃. It is recommended that the protein be aliquoted for optimal storage. Avoid repeated freeze-thaw cycles.
Reconstitution
A hardcopy of COA with reconstitution instruction is sent along with the products. Please refer to it for detailed information.

Influenza A H9N2 (A/Hong Kong/1073/99) Hemagglutinin / HA Protein (His Tag): Images

Hemagglutinin / HA Background Information

The influenza viral Hemagglutinin (HA) protein is a homo trimer with a receptor binding pocket on the globular head of each monomer.HA has at least 18 different antigens. These subtypes are named H1 through H18.HA has two functions. Firstly, it allows the recognition of target vertebrate cells, accomplished through the binding to these cells' sialic acid-containing receptors. Secondly, once bound it facilitates the entry of the viral genome into the target cells by causing the fusion of host endosomal membrane with the viral membrane.The influenza virus Hemagglutinin (HA) protein is translated in cells as a single protein, HA, or hemagglutinin precursor protein. For viral activation, hemagglutinin precursor protein (HA) must be cleaved by a trypsin-like serine endoprotease at a specific site, normally coded for by a single basic amino acid (usually arginine) between the HA1 and HA2 domains of the protein. After cleavage, the two disulfide-bonded protein domains produce the mature form of the protein subunits as a prerequisite for the conformational change necessary for fusion and hence viral infectivity.
Full Name
Harvey rat sarcoma viral oncogene homolog
References
  • White JM, Hoffman LR, Arevalo JH, et al. (1997). ""Attachment and entry of influenza virus into host cells. Pivotal roles of hemagglutinin"". In Chiu W, Burnett RM, Garcea RL. Structural Biology of Viruses.
  • Suzuki Y (March 2005). ""Sialobiology of influenza: molecular mechanism of host range variation of influenza viruses"". Biol. Pharm. Bull. 28 (3): 399–408.
  • Senne DA, Panigrahy B, Kawaoka Y, et al. (1996). ""Survey of the hemagglutinin (HA) cleavage site sequence of H5 and H7 avian influenza viruses: amino acid sequence at the HA cleavage site as a marker of pathogenicity potential"". Avian Dis. 40 (2): 425–37
  • Label-free detection and characterization of the binding of hemagglutinin protein and broadly neutralizing monoclonal antibodies using terahertz spectroscopy
    Author
    Sun, Y;Zhong, J;Zhang, C;Zuo, J;Pickwell-MacPherson, E;
    Year
    2015
    Journal
    J Biomed Opt
    Application
    ELISA
  • Simultaneous Targeting of Multiple Hemagglutinins to APCs for Induction of Broad Immunity against Influenza
    Author
    Anderson, AM;Baranowska-Hustad, M;Braathen, R;Grodeland, G;Bogen, B;
    Year
    2018
    Journal
    J. Immunol.
    Application
    ELISA
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