Transglutaminase 2/TGM2 Colorimetric Assay Kit
货号：
NBP1-37008 基本售价：
9874.8 元 规格：
1 Plate
产品信息
性能| 供应商 | Novus |
| 背景 | Transglutaminases (EC. 2.3.213, R- glutamyl-peptide amine g-glutamyl-transferase) are a family of calcium dependent enzymes which catalyse an acyl transferase reaction between the g-carboxamide group of peptide bound glutamine and various primary amines. In mammals, at least eight active transglutaminase (TGs) isoenzymes have been described so far. They are widely distributed in various organs, tissues and body fluids. Among them, transglutaminase type 2 (TG2) is distinguished from others TGs by its functional versatility and ubiquitous expression pattern in mammalian tissues. This isoenzyme is involved in a variety of roles including stabilization of intra and extracellular matrices and crosslinking of cell envelopes in apoptosis. It has also been associated with a large number of pathological conditions such as fibrosis, celiac disease, neurodegenerative disorders, inflammatory processes in sepsis, and in carcinogenesis of hepatocellular and ovarian carcinoma. This consideration has led to the development of several tests for either research or clinical purpose. Among the various strategies developed to measure TG activity, the most sensitive and accurate quantification methods, although non-discriminatory, have been the radioactive and fluorimetric assays. Those methods detect the incorporation of labeled molecules, such as [3H/14C]-putrescine or monodansyl-cadaverine respectively, into glutamyl substrates such as casein or synthetic peptides. Solid phase assays developed so far in similar principles have been compromise by a high background signal, low sensitivity compare to radiolabeling methods and the lack of the specificity. This test kit overcomes these problems and constitutes a highly sensitive and specific TG2 solid-phase microassay. The TG2-Covtest uses a biotinylated preferred first substrate of TG2 (biotin-pepT26) as amine-acceptor, and spermine as second substrate (amine-donor) of the enzyme. Samples suspected of containing TG2 are incubated with calcium, dithiothreitol (DTT) and biotin-pepT26 in the wells of microtiter plates to which spermine has been covalently coupled. In the presence of TG2, spermine is incorporated into the g carboxamide of the glutaminyl residue of biotin-pepT26 to form a biotin-pepT26- g-glutamyl spermine. Enzymatic reaction is determined by its interaction with Streptavidin labelled peroxidase (SAv-HRP). Following a wash step to remove any unbound enzyme reagent, a substrate solution for SAv-HRP containing H2O2 and tetramethyl benzidine as electron acceptor (chromogen) is added and color developed. The color intensity is directly proportional to the TG2 activity in the sample. |
| 存放说明 | Storage is content dependent. |
