膜杰作
Star Staining
分子别名（Synonym）
CD8A,CD8,Leu2,MAL,p32
表达区间及表达系统（Source）
Cynomolgus CD8 alpha Protein, His Tag (CDA-C52H4) is expressed from human 293 cells (HEK293). It contains AA Asn 63 - Asp 223 (Accession # XP_005575419.2).
Predicted N-terminus: Asn 63
Request for sequence
蛋白结构（Molecular Characterization）
This protein carries a polyhistidine tag at the C-terminus.
The protein has a calculated MW of 19.6 kDa. The protein migrates as 20-30 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）
>95% as determined by SDS-PAGE.
>95% as determined by SEC-MALS.
制剂（Formulation）
Lyophilized from 0.22 μm filtered solution in PBS, pH7.4 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）
Cynomolgus CD8 alpha 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 95% (With Star Ribbon Pre-stained Protein Marker).
SEC-MALS
The purity of Cynomolgus CD8 alpha Protein, His Tag (Cat. No. CDA-C52H4) is more than 95% and the molecular weight of this protein is around 46-56 kDa verified by SEC-MALS.
Report
活性（Bioactivity）-ELISA
Immobilized Cynomolgus CD8 alpha Protein, His Tag (Cat. No. CDA-C52H4) at 5 μg/mL (100 μL/well) can bind Anti-CD8 alpha Antibody, Human IgG1 with a linear range of 0.1-8 ng/mL (QC tested).
Protocol
背景（Background）
Integral membrane glycoprotein that plays an essential role in the immune response and serves multiple functions in responses against both external and internal offenses. Interacts simultaneously with the T-cell receptor (TCR) and the MHC class I proteins presented by antigen presenting cells (APCs). In turn, recruits the Src kinase LCK to the vicinity of the TCR-CD3 complex. In NK-cells, the presence of CD8A homodimers at the cell surface provides a survival mechanism allowing conjugation and lysis of multiple target cells. CD8A homodimer molecules also promote the survival and differentiation of activated lymphocytes into memory CD8 T-cells.
