重组SARS-CoV-2 S1蛋白(His tag)(＞90%)

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产品名称：重组SARS-CoV-2 S1蛋白(His tag)
英文名称：Recombinant SARS-CoV-2 Spike Protein S1 Subunit
产品货号：Q15507
产品规格：100μg

纯度：＞90% as determined by SDS-PAGE.

内毒素：＜1.0 EU per μg protein as determined by the LAL method.

生物活性：The SARS-CoV-2 Spike Protein (S1 Subunit,His Tag) can bind with Human ACE2 in functional ELISA assay.

蛋白构建：A DNA sequence encoding the SARS-CoV-2 spike protein S1 Subunit was expressed with a polyhistidine tag at the C-terminus.

表达宿主：HEK293 Cells

预测N端：Val

分子量：The recombinant SARS-CoV-2 Spike Protein (S1 Subunit,His Tag) consists of 681 amino acids and predicts a molecular mass of 76.5kDa.

缓冲液：
Lyophilized from sterile PBS,pH7.4.
Please contact us for any concerns or special requirements.
Normally 5% - 8% trehalose,mannitol and 0.01% Tween80 are added as protectants before lyophilization.
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 -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.

复溶：A hardcopy of COA with reconstitution instruction is sent along with the products.Please refer to it for detailed information.

背景资料：
The spike (S) glycoprotein of coronaviruses contains protrusions that will only bind to certain receptors on the host cell.Known receptors bind S1 are ACE2,angiotensin-converting enzyme 2;DPP4,dipeptidyl peptidase-4;APN,aminopeptidase N;CEACAM,carcinoembryonic antigen-related cell adhesion molecule 1;Sia,sialic acid;O-ac Sia,O-acetylated sialic acid.The spike is essential for both host specificity and viral infectivity.The term "peplomer" is typically used to refer to a grouping of heterologous proteins on the virus surface that function together.The spike (S) glycoprotein of coronaviruses is known to be essential in the binding of the virus to the host cell at the advent of the infection process.It"s been reported that 2019-nCoV can infect the human respiratory epithelial cells through interaction with the human ACE2 receptor.The spike protein is a large type I transmembrane protein containing two subunits,S1 and S2.S1 mainly contains a receptor binding domain (RBD),which is responsible for recognizing the cell surface receptor.S2 contains basic elements needed for the membrane fusion.The S protein plays key parts in the induction of neutralizing-antibody and T-cell responses,as well as protective immunity.The main functions for the Spike protein are summarized as:Mediate receptor binding and membrane fusion;Defines the range of the hosts and specificity of the virus;Main component to bind with the neutralizing antibody;Key target for vaccine design;Can be transmitted between different hosts through gene recombination or mutation of the receptor binding domain (RBD),leading to a higher mortality rate.

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