Influenza A H9N2 (A/Duck/HongKong/448/78) Hemagglutinin Protein (His Tag)

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Influenza A H9N2 (A/Duck/HongKong/448/78) Hemagglutinin Protein (His Tag): 产品信息

纯度
> 95 % as determined by SDS-PAGE.
内毒素
< 1.0 EU per μg protein as determined by the LAL method.
生物活性
Testing in progress
蛋白构建
A DNA sequence encoding the Influenza A virus (A/Duck/HongKong/448/78(H9N2)) hemagglutinin (AAO46079.1) (Met1-Arg338),termed as HA1, was expressed with a polyhistidine tag at the C-terminus.
GenBank No.
表达宿主
HEK293 Cells
种属
H9N2
预测 N 端
Asp 19
分子量
The recombinant HA1 subunit of the Influenza A virus hemagglutinin (A/Duck/HongKong/448/78(H9N2)) consists of 331 amino acids and predicts a molecular mass of 37.2 kDa.
缓冲液
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.
运输方式
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.
稳定性 & 储存条件
Samples are stable for up to twelve months from date of receipt at -70℃
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.
复溶
A hardcopy of COA with reconstitution instruction is sent along with the products. Please refer to it for detailed information.

Influenza A H9N2 (A/Duck/HongKong/448/78) Hemagglutinin Protein (His Tag): 图片

Hemagglutinin / HA 背景信息

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.
全称
Harvey rat sarcoma viral oncogene homolog
参考文献
  • 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

H5N1 Hemagglutinin / HA 蛋白

H3N2 Hemagglutinin / HA 蛋白

H1N1 Hemagglutinin / HA 蛋白

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