Complement Factor D (CFD), BioAssay(TM) ELISA Kit (Human)

Complement factor D(CFD), also called ADIPSIN or FACTOR D, is a protein which in humans is encoded by the CFD gene. The protein encoded by this gene belongs to the trypsin family of peptidases. It is mapped to 19p13.3. The encoded protein is a component of the alternative complement pathway which is best known for its role in humoral suppression of infectious agents. This protein is also a serine protease that is secreted by adipocytes into the bloodstream. Finally, the encoded protein has a high level of expression in fat, suggesting a role for adipose tissue in immune system biology. Factor D is a serine protease that stimulates glucose transport for triglyceride accumulation in fats cells and inhibits lipolysis. Sample Type: Cell culture supernates, serum, plasma (heparin, EDTA) and urine, Intended Use: For quantitative detection of human CFD in cell culture supernates, serum, plasma(heparin , EDTA) and urine. Sensitivity: <10pg/ml, Range: 312-20,000pg/ml, Specificity: Natural and recombinant human CFD , Test Principle: This human CFD BioAssay(TM) ELISA Kit was based on standard sandwich enzyme-linked immune-sorbent assay technology. A monoclonal antibody from mouse specific for CFD has been precoated onto 96-well plates. Standards(NSO, I26-A253) and test samples are added to the wells, a biotinylated detection polyclonal antibody from goat specific for CFD is added 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 human CFD amount of sample captured in plate. Kit Components: 96-well plate precoated with human CFD antibody, 1, ST0000-20, Lyophilized recombinant human CFD standard, 20ng/tube×2, Biotinylated human CFD antibody, 130ul (dilution 1:100), Avidin-Biotin-Peroxidase Complex (ABC), 130ul (dilution 1:100), Sample diluent buffer, 30ml, Antibody diluent buffer, 12ml, ABC diluent buffer, 12ml, TMB color developing agent, 10ml, TMB stop solution, 10ml, Storage and Stability: Store powder at 4°C liquid at -20°C. Store other components at 4°C. Stable for at least 6 months For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap.