Human OX40 Ligand, Mouse IgG2a Fc Tag, low endotoxin (OXL-H5250) is expressed from human 293 cells (HEK293). It contains AA Gln 51 - Leu 183 (Accession # P23510-1).
Predicted N-terminus: Gln 51
This protein carries a mouse IgG2a Fc tag at the C-terminus.
The protein has a calculated MW of 42.3 kDa. The protein migrates as 53-60 kDa under reducing (R) condition (SDS-PAGE) due to glycosylation.
Less than 0.1 EU per μg by the LAL method.
>95% as determined by SDS-PAGE.
Lyophilized from 0.22 μm filtered solution in 50 mM Tris, 100 mM Glycine, pH7.5. Normally trehalose is added as protectant before lyophilization.
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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.
No activity loss was observed after storage at:
- 4-8°C for 12 months in lyophilized state;
- -70°C for 3 months under sterile conditions after reconstitution.
Human OX40 Ligand, Mouse IgG2a Fc Tag, low endotoxin on SDS-PAGE under reducing (R) condition. The gel was stained overnight with Coomassie Blue. The purity of the protein is greater than 95%.
Immobilized Human OX40, Fc Tag (Cat. No. OX0-H5255) at 0.5 μg/mL (100 μL/well) can bind Human OX40 Ligand, Mouse IgG2a Fc Tag, low endotoxin (Cat. No. OXL-H5250) with a linear range of 0.8-13 ng/mL (QC tested).
FACS assay shows that recombinant Human OX40 Ligand, Mouse IgG2a Fc Tag, low endotoxin (Cat. No. OXL-H5250) can bind to 293T cell overexpressing human OX40. The concentration of OX40 Ligand is 0.003 μg/ml (Routinely tested).
FACS analysis shows that the binding of Human OX40 Ligand, Mouse IgG2a Fc Tag, low endotoxin (Cat. No. OXL-H5250) to 293T overexpressing OX40 was inhibited by increasing concentration of neutralizing anti-OX40 antibody. The concentration of OX40 Ligand used is 0.002 μg/ml. IC50=3.021 μg/ml (Routinely tested).
Tumor necrosis factor ligand superfamily member 4 (TNFSF4) is also known as glycoprotein Gp34, OX40 ligand (OX40L), TAX transcriptionally-activated glycoprotein 1 and CD252, which belongs to the tumor necrosis factor family. TNFSF4 is the ligand for CD134 and is expressed on such cells as DC2s (a subtype of dendritic cells) enabling amplification of Th2 cell differentiation. The interaction of TNFSF4-TNFSF4 is involved in the pathogenesis of multiple autoimmune and inflammatory diseases such as systemic lupus erythematosus (SLE), carotid artery disease and cancer. Furthermore, similar to other TNF superfamily members, membrane-bound OX40 Ligand (TNFSF4) exists as a homotrimer. Human TNFSF4 shares 46% amino acid sequence identity with its mouse counterpart.