The B cell-activating factor from the TNF family (BAFF), is emerging as an important regulator of B cell and T cell responses. BAFF was originally identified as a factor responsible for B cell survival and maturation. BAFF binds to several receptors. These include transmembrane activator and calcium modulator and cyclophilin ligand interactor (TACI), BAFF-R (BR3), and B cell maturation Ag (BCMA). BAFF-R appears to be particularly important for the regulation of B cell survival and maturation in the spleen, because A/WySnJ mice expressing a defective BAFF-R have disrupted B cell maturation, similar to that seen in BAFF-deficient mice.
Alternative Names
TNFSF20 ; B lymphocyte stimulator ; BLys ; THANK ; Dendritic cell-derived TNF-like molecule ; TNF- and APOL-related leukocyte expressed ligand 1 ; TALL-1 ; CD_antigen=CD257 ; B cell Activating Factor belonging to the TNF family ; BAFF ; Tumor necrosis factor ligand superfamily member 13B ; TNFSF13B
Quantity
1.0 mg
Regulatory
RUO
Source
E. coli
Host
Human
Endotoxin Level
<1.0 EU/μg of recombinant protein as determined by the LAL method.
Biological Activity Comment
The ED(50) was determined by a cell proliferation assay using anti-IgM stimulated murine B cells, and is less than 2.0 ng/mL, corresponding to a specific activity of 5.0 x 10^5 IU/mg
Weight
18.0 kDa
Description
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.
Format
Lyophilized PowderRecombinant Human BAFF was lyophilized from a 0.2 μm filtered solution in PBS, pH 7.5.
Purity
>95% as determined by SDS-PAGE
Storage
The lyophilized protein is stable for at least one year from date of receipt at -70°C. Upon reconstitution, this cytokine can be stored in working aliquots at 2° - 8°C for one month, or at -20°C for six months, with a carrier protein without detectable loss of activity. Avoid repeated freeze/thaw cycles.