Description:PRINCIPLE OF THE ASSAY This assay employs the quantitative competitive enzyme immunoassay technique. Recombinant Human TNFa has been pre-coated onto a microplate. Standards or samples are premixed with biotin-labeled antibody and then pipetted into the wells. Certolizumab in the sample competitively binds to the pre-coated protein with biotin-labeled Certolizumab. After washing away any unbound substances, Streptavidin-HRP is added to the wells. Following a wash to remove any unbound enzyme reagent, a substrate solution is added to the wells and color develops in inversely proportion to the amount of Certolizumab bound in the initial step. The color development is stopped and the intensity of the color is measured. Stability and Storage:When the kit was stored at the recommended temperature for 6 months, the signal intensity decreased by less than 20%. For unopened kits, if you want to prolong the storage time, please store the Standard, Detection A, Detection B and Microplate at - 20 ℃, the rest reagents should be store at 4℃. Detection method:Colorimetric Sample type:Plasma, Serum Assay type:Quantitative Sensitivity:329.66 ng/mL Range:468.75 - 30,000 ng/mL Recovery:80-120% Background:Certolizumab pegol is a recombinant, humanized F(ab)’ fragment of an antibody conjugated to polyethylene glycol to enhance its plasma half-life. It does not contain an FC region and therefore does not cause antibody-dependent cell-mediated or complement-dependent cytotoxicity as described for infliximab, etanercept, and adalimumab. Another difference is that certolizumab pegol preferentially penetrates inflamed tissue compared to noninflamed tissue, and does so to a greater extent than adalimumab or infliximab. It is directed against soluble and membrane-associated human TNF-α and was approved for the treatment of Crohn’s disease that does not respond to conventional therapy in 2008 and for RA in 2009. Shipping:2-8 ℃ Specifications:Certolizumab Note:For Research Use Only.