4-1BB Receptor (CD137) is a member of the TNF receptor superfamily expressed on activated CD4 and CD8 T cells as well as on activated natural killer cells. The binding of 4-1BB Receptor to its TNF family ligand, 4-1BB ligand (4-1BBL) delivers a co-stimulatory signal to resting T cells leading to high level IL2 production independently of CD28 signaling. Recombinant Human 4-1BB Receptor represents the soluble, cysteine-rich TNFR-like extracellular domain of 4-1BB Receptor.
<1.0 EU/μg of recombinant protein as determined by the LAL method
>95% as determined by SDS-PAGE
The ED50 as determined by dose dependent proliferation of human megakaryocytic leukemia cell line is <0.5ng/ml.
Lyophilized from 0.2 μm filtered solution in PBS (pH 7.5)
A quick spin of the vial followed by reconstitution in distilled water to a concentration not less than 0.1 mg/mL. This solution can then be diluted into other buffers.
Recombinant 4-1BB Receptor can be stored in working aliquots at 2° - 8°C for one month, or at -20°C to -70°C for twelve months. Avoid repeated freeze/thaw cycles.
For research use only. Not for diagnostic or therapeutic use.