Human CD40 Ligand (hCD40L) #3583
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Inquiry Info. # 3583
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Product Information
Formulation
With carrier: Lyophilized from a 0.22 μm filtered solution of PBS, pH 7.2 containing 20 μg BSA per 1 μg hCD40L. Carrier free: Lyophilized from a 0.22 μm filtered solution of PBS, pH 7.2.
Storage
Stable in lyophilized state at 4°C for 1 year after receipt. Sterile stock solutions reconstituted with carrier protein are stable at 4°C for 2 months and at -20°C for 6 months. Avoid repeated freeze-thaw cycles.
Maintain sterility. Storage at -20°C should be in a manual defrost freezer.
Maintain sterility. Storage at -20°C should be in a manual defrost freezer.
Product Description
| MW (kDa) | 16 |
| Purity | >98% as determined by SDS-PAGE of 6 μg reduced (+) and non-reduced (-) recombinant hCD40L. All lots are greater than 98% pure. |
| Endotoxin | Less than 0.01 ng endotoxin/1 μg hCD40L. |
| Activity | The bioactivity of recombinant hCD40L was determined in a cell proliferation assay using human B cells. The ED50 of each lot is between 0.5-2 μg/ml. |
| Molecular Formula | Recombinant hCD40L has a Met on the amino terminus and has a calculated MW of 16,184. DTT-reduced and non-reduced protein migrate as 16 kDa polypeptides. The expected amino terminus MQKGD of recombinant hCD40L was verified by amino acid sequencing. |
Source / Purification
Recombinant human CD40 Ligand (hCD40L) Met113-Leu261 (Accession #P29965) was produced in E. coli at Cell Signaling Technology.
Background
CD40 Ligand (CD40L), a member of the TNF superfamily of ligands, is expressed as either a membrane-bound or soluble homotrimer (1). Both membrane-bound and soluble forms of CD40L have biological activity (1,2). CD40L is expressed primarily on activated T cells; however, mast cells, basophils, and NK cells may also express CD40L (1). CD40L functions as an important T cell co-stimulatory molecule and enhances T-dependent B cell responses (1,2). CD40L binds CD40, which is a receptor expressed on B cells, dendritic cells, and macrophages (1). Binding of CD40L to CD40 leads to the recruitment of TRAF proteins (TRAFs 2,3,5, and 6) resulting in the activation of the JNK and NF-κB pathways (1,2).
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For Research Use Only. Not For Use In Diagnostic Procedures.
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