膜杰作
Star Staining
分子别名（Synonym）
Envelope glycoprotein gp140
表达区间及表达系统（Source）
Human immunodeficiency virus 1 gp140 Protein, His Tag (GP0-V52H3) is expressed from human 293 cells (HEK293).
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蛋白结构（Molecular Characterization）
This protein carries a polyhistidine tag at the C-terminus.
The protein has a calculated MW of 53.7 kDa & 19.3 kDa. The protein migrates as 110-120 kDa when calibrated against Star Ribbon Pre-stained Protein Marker under reducing (R) condition (SDS-PAGE) due to glycosylation.
内毒素（Endotoxin）
Less than 1.0 EU per μg by the LAL method.
纯度（Purity）
>90% as determined by SDS-PAGE.
制剂（Formulation）
Lyophilized from 0.22 μm filtered solution in PBS with trehalose as protectant.
Contact us for customized product form or formulation.
重构方法（Reconstitution）
Please see Certificate of Analysis for specific instructions.
For best performance, we strongly recommend you to follow the reconstitution protocol provided in the CoA.
存储（Storage）
For long term storage, the product should be stored at lyophilized state at -20°C or lower.
Please avoid repeated freeze-thaw cycles.
This product is stable after storage at:
- -20°C to -70°C for 12 months in lyophilized state;
- -70°C for 3 months under sterile conditions after reconstitution.
电泳（SDS-PAGE）
Human immunodeficiency virus 1 gp140 Protein, His Tag on SDS-PAGE under reducing (R) condition. The gel was stained with Coomassie Blue. The purity of the protein is greater than 90% (With Star Ribbon Pre-stained Protein Marker).
SEC-MALS
The purity of Human immunodeficiency virus 1 gp140 Protein, His Tag (Cat. No. GP0-V52H3) is more than 85% and the molecular weight of this protein is around 330-370 kDa verified by SEC-MALS.
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活性（Bioactivity）-ELISA
Immobilized Human CD4 Protein, Fc Tag (Cat. No. CD4-H5259) at 5 μg/mL (100 μL/well) can bind Human immunodeficiency virus 1 gp140 Protein, His Tag (Cat. No. GP0-V52H3) with a linear range of 0.005-0.156 μg/mL (QC tested).
Protocol
背景（Background）
The trimeric envelope glycoproteins (Env) that are displayed on human and simian immunodeficiency viruses (HIV and SIV, respectively) are heterodimers of the transmembrane glycoprotein (gp41) and a surface glycoprotein (gp120). The glycoproteins gp120 and gp41 are synthesized initially as a single gp160 polypeptide that is subsequently cleaved to generate the noncovalently associated gp120/gp41 complex. Soluble versions of trimeric gp140, either cleaved or uncleaved, are being developed as immunogens to elicit a protective humoral immune response against HIV-1 infection.
