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Human CD8A&CD8B Heterodimer Protein, His Tag&Tag Free, produced by co-expression of CD8 alpha and CD8 beta, has a calculated MW of 19.5 kDa (CD8 alpha) and 22.1 kDa (CD8 beta). Subunit CD8 alpha is fused with an acidic tail at the C-terminus and followed by a polyhistidine tag and subunit CD8 beta contains no tag but a basic tail at the C-terminus. As a result of glycosylation, the heterodimer protein migrates as 30-32 kDa and 32-34 kDa under reducing (R) condition, and 30-33 kDa and 58-70 kDa under non-reducing (NR) condition (SDS-PAGE).
>95% as determined by SDS-PAGE.
Lyophilized from 0.22 μm filtered solution in PBS, pH7.4 with trehalose as protectant.
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Please see Certificate of Analysis for specific instructions.
For best performance, we strongly recommend you to follow the reconstitution protocol provided in the CoA.
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:
Human CD8A&CD8B Heterodimer Protein, His Tag&Tag Free on SDS-PAGE under reducing (R) and non-reducing (NR) conditions. The gel was stained with Coomassie Blue. The purity of the protein is greater than 95%.
The purity of Human CD8A&CD8B Heterodimer Protein, His Tag&Tag Free (Cat. No. CDA-H52W5) is more than 85% and the molecular weight of this protein is around 53-68 kDa verified by SEC-MALS.
Immobilized Human CD8A&CD8B Heterodimer Protein, His Tag&Tag Free (Cat. No. CDA-H52W5) at 2 μg/mL (100 μL/well) can bind Anti-CD8 alpha Antibody, Mouse IgG2a (clone: OKT8) with a linear range of 0.06-4 ng/mL (QC tested).
Immobilized Anti-CD8 alpha Antibody, Mouse IgG2a (clone: OKT8) at 1 μg/mL (100 μL/well) can bind Human CD8A&CD8B Heterodimer Protein, His Tag&Tag Free (Cat. No. CDA-H52W5) with a linear range of 2-39 ng/mL (Routinely tested).
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