| Description | The ABTS (2,2’-azino-bis [3-ethylbenzthiazoline-6-sulfonic acid]) substrate is supplied as a one component, ready-to-use solution for ELISA applications. A soluble blue-green reaction product is obtained when this substrate system is reacted with horseradish peroxidase. Usage suggestionsThe The ABTS (2,2’-azino-bis [3-ethylbenzthiazoline-6-sulfonic acid]) substrate is supplied as a one component, ready-to-use solution for ELISA applications. A soluble blue-green reaction product is obtained when this substrate system is reacted with horseradish peroxidase. Usage suggestionsThe product should be allowed to reach room temperature (25°C) prior to use. 1) For immunoassay microwell applications, 100 µl of substrate solution is added to each well producing a soluble, blue‐green product. Color development time can range between 10‐40 minutes depending on the assay. It is recommended that development time be optimized for your assay conditions.2) For best results, sample absorbance values should be monitored and read before absorbance values exceed 2.0 OD units. Sample OD values can be read with or without the addition of stop solution in the 405‐410 nmrange.The substrate reaction can be stopped using 650 nm Liquid Stop Solution for TMB Microwell Substrates (LBSP).3) Dilution of the substrate is not recommended. It is recommended that the antibodies or conjugates be diluted to reduce the intensity of the reaction. The product is not recommended for membrane or IHC applications that require a precipitating reaction product... Read More | Inquire | Inquire | Carboxypeptidase B catalyzes hydrolysis of the basic amino acids lysine, arginine and histidine from theC-terminal end of polypeptides. The molecular weight is 34,500 daltons, the pH optimum is 8.0, and pI is 6.0.Carboxypeptidase B is competitively inhibited by arginine and lysine. The enzyme is Carboxypeptidase B catalyzes hydrolysis of the basic amino acids lysine, arginine and histidine from theC-terminal end of polypeptides. The molecular weight is 34,500 daltons, the pH optimum is 8.0, and pI is 6.0.Carboxypeptidase B is competitively inhibited by arginine and lysine. The enzyme is also inhibited by metal chelating agents, e.g., EDTA. Recombinant Carboxypeptidase B (EC 3.4.17.2) is expressed in E.Coli and purified by high pressure liquid chromatography. There is no trace of other enzyme (such as carboxypeptidase A and chymotrypsin) activity. No protease inhibitors such as PMSF are present in the preparation.Animal origin free:eliminate the risk of virus presence, or of any other potential adventitious agents found in animal-derived carboxypeptitase B.Stability:A sterile recombinant carboxypeptidase B lyophilized eliminates the risk of contamination and decreases the chances of activity loss in the process of transport and storage. High purity:1) Recombinant carboxypeptidase B provides increased specific activity and eliminates contaminating protease activities found in extracted enzymes with lower purity level. 2) No other contaminating proteases such as chymotrypsin and carboxypeptidase A. 3）Less than 10ppm of recombinant trypsin... Read More | Purity>95% (SDS-PAGE) Endotoxin level<1.0 EU/µgFunctionInhibits the synthesis of a number of cytokines, including IFN-gamma, IL-2, IL-3, TNF and GM-CSF produced by activated macrophages and by helper T-cells |