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
B cell Activating Factor belonging to the TNF family ; BAFF ; Tumor necrosis factor ligand superfamily member 13B ; TNFSF13B ; 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
Appearance
Lyophilized Powder
Reconstitution
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.
Formulation
Recombinant Human BAFF was lyophilized from a 0.2 μm filtered solution in PBS, pH 7.5.
Molecular Weight
18.0 kDa
Quantity
100 µg
Source
E. coli
Usage
For research use only. Not for diagnostic or therapeutic use.
Accession Number
Q9Y275
Endotoxin Level
<1.0 EU/μg of recombinant protein as determined by the LAL method.
Bioactivity
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
Gene Id
10673
Gene Name
TNFSF13B
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.