AdipoGen BAFF, Soluble (human) (60-mer) (rec.) (highly active) (3 x 10 µg)

Supplier:  AdipoGen AG40B01123010

Protein. The extracellular domain of human BAFF (aa 134-285) is fused at the N-terminus to a His-tag. Source: E. coli. Endotoxin content: <0.01EU/µg purified protein (LAL test; Lonza). Lyophilized. Contains PBS. Binds to human and mouse BAFF-R, TACI and BCMA. Relative binding affinity (EC50) for BAFF-R (human): ~3ng/ml. Purity: >95% (SDS-PAGE). Processed human BAFF can either remain as a trimer, which is usual for TNF family ligands or assemble into 60-mer composed of 20 trimers. Mouse BAFF 60-mer has been identified in the serum of BAFF transgenic mice. Oligomerization of BAFF 3-mer into 60-mer in human BAFF is prevented by mutation of His218, a residue critical for 3-mer-to-3-mer interactions, but not for receptor binding. Despite the predominant functional role of processed BAFF in vivo, membrane-bound BAFF might also play a role. Indeed, soluble BAFF (3-mer) can trigger BAFF-R but not TACI or BCMA, whereas oligomeric forms of BAFF (BAFF 60-mer), activate all BAFF receptors.

Catalog No. 50-205-3181