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EK000117-EK0663: Human BAFF ELISA Kit
Range 62.5pg/ml-4000pg/ml
Sensitivity < 2pg/ml
Specificity: No detectable cross-reactivity with any other cytokine.
Application: For quantitative detection of human BAFF in sera, plasma, body fluids, tissue lysates or cell culture supernates.
Expiration: Two months at 4°C and four months at -20°C .
Background
B-cell activating factor (BAFF) also known as tumor necrosis factor ligand superfamily member 13B is a protein that in humans is encoded by the TNFLSF13B gene.1,2 BAFF is a cytokine that belongs to the tumor necrosis factor (TNF) ligand family. This cytokine is a ligand for receptors TNFRSF13B/TACI, TNFRSF17/BCMA, and TNFRSF13C/BAFFR. This cytokine is expressed in B cell lineage cells, and acts as a potent B cell activator. It has been also shown to play an important role in the proliferation and differentiation of B cells.3All these ligands act as heterotrimers (i.e. three of the same molecule) interacting with heterotrimeric receptors4, although BAFF has been known to be active as either a hetero- or homotrimer.5 The standard used in this kit is recombinant soluble BAFF (A127-L309) with molecular weight 23.2KDa.
Principle
BAFF ELISA Kit was based on standard sandwich enzyme-linked immune-sorbent assay technology. Mouse BAFFspecific-specific polyclonal antibodies were precoated onto 96-well plates. The mouse specific detection polyclonal antibodies were biotinylated. The test samples and biotinylated detection antibodies were added to the wells subsequently and then followed by washing with PBS or TBS buffer. Avidin-Biotin-Peroxidase Complex was added and unbound conjugates were washed away with PBS or TBS buffer. HRP substrate TMB was used to visualize HRP enzymatic reaction. TMB was catalyzed by HRP to produce a blue color product that changed into yellow after adding acidic stop solution. The density of yellow is proportional to the mouse BAFF amount of sample captured in plate.
Reference
1. Shu HB, Hu WH, Johnson H (May 1999). "TALL-1 is a novel member of the TNF family that is down-regulated by mitogens". J. Leukoc. Biol. 65 (5): 680.
2. Schneider P, MacKay F, Steiner V, Hofmann K, Bodmer JL, Holler N, Ambrose C, Lawton P, Bixler S, Acha-Orbea H, Valmori D, Romero P, Werner-Favre C, Zubler RH, Browning JL, Tschopp J (June 1999). "BAFF, a novel ligand of the tumor necrosis factor family, stimulates B cell growth". J. Exp. Med. 189 (11): 1747-6.
3. "Entrez Gene: tumor necrosis factor (ligand) superfamily".
4. Oren,D.A., Li,Y., Volovik,Y., Morris,T.S., Dharia,C., Das,K., Galperina,O., Gentz,R. and Arnold,E. (2002). "Structural basis of BLyS receptor recognition". Nat. Struct. Biol. 9 (4): 288-92.
5. Daridon C, Youinou P, Pers JO (February 2008). "BAFF, APRIL, TWE-PRIL: who's who?". Autoimmun Rev 7 (4): 267-1.
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