Cyclooxygenase COX Activity Assay Kit (Fluorometric) (ab204699) provides a simple, sensitive, and high-throughput adaptable method to detect the peroxidase activity of COX in biological samples or purified/crude enzyme preparations.
- Fluorometric readout (535/587 nm) - works on microplate-reader
- includes COX-1 and COX-2 specific inhibitors to differentiate the activity of COX-1 and COX-2
Individual kit components also available for purchase with a minimum order of 20 units. Contact us to discuss your needs.
Dual cyclooxygenase and peroxidase that plays an important role in the biosynthesis pathway of prostanoids, a class of C20 oxylipins mainly derived from arachidonate ((5Z,8Z,11Z,14Z)-eicosatetraenoate, AA, C20:4(n-6)), with a particular role in the inflammatory response. The cyclooxygenase activity oxygenates AA to the hydroperoxy endoperoxide prostaglandin G2 (PGG2), and the peroxidase activity reduces PGG2 to the hydroxy endoperoxide prostaglandin H2 (PGH2), the precursor of all 2-series prostaglandins and thromboxanes. This complex transformation is initiated by abstraction of hydrogen at carbon 13 (with S-stereochemistry), followed by insertion of molecular O2 to form the endoperoxide bridge between carbon 9 and 11 that defines prostaglandins. The insertion of a second molecule of O2 (bis-oxygenase activity) yields a hydroperoxy group in PGG2 that is then reduced to PGH2 by two electrons (PubMed:7947975). Involved in the constitutive production of prostanoids in particular in the stomach and platelets. In gastric epithelial cells, it is a key step in the generation of prostaglandins, such as prostaglandin E2 (PGE2), which plays an important role in cytoprotection. In platelets, it is involved in the generation of thromboxane A2 (TXA2), which promotes platelet activation and aggregation, vasoconstriction and proliferation of vascular smooth muscle cells (Probable). Can also use linoleate (LA, (9Z,12Z)-octadecadienoate, C18:2(n-6)) as substrate and produce hydroxyoctadecadienoates (HODEs) in a regio- and stereospecific manner, being (9R)-HODE ((9R)-hydroxy-(10E,12Z)-octadecadienoate) and (13S)-HODE ((13S)-hydroxy-(9Z,11E)-octadecadienoate) its major products (By similarity).
PTGS2
COX1, PTGS1, Prostaglandin G/H synthase 1, Cyclooxygenase-1, Prostaglandin H2 synthase 1, Prostaglandin-endoperoxide synthase 1, COX-1, PGH synthase 1, PGHS-1, PHS 1
Cyclooxygenase COX Activity Assay Kit (Fluorometric) (ab204699) provides a simple, sensitive, and high-throughput adaptable method to detect the peroxidase activity of COX in biological samples or purified/crude enzyme preparations.
- Fluorometric readout (535/587 nm) - works on microplate-reader
- includes COX-1 and COX-2 specific inhibitors to differentiate the activity of COX-1 and COX-2
Individual kit components also available for purchase with a minimum order of 20 units. Contact us to discuss your needs.
Cyclooxygenase COX Activity Assay Kit (Fluorometric) (ab204699) provides a simple, sensitive, and high-throughput adaptable method to detect the peroxidase activity of COX in biological samples or purified/crude enzyme preparations. The kit includes COX-1 and COX-2 specific inhibitors to differentiate the activity of COX-1 and COX-2 as well as other peroxidases, which may be present in the sample. Detection limit: 6 μU/mg.
How the Cox activity assay works
Cyclooxygenase (COX) Activity Assay Kit ab204699 measures COX peroxidase activity by detecting the conversion of arachidonic acid to prostaglandin G2 (PGG2), which reacts with a COX probe to produce a fluorescent signal proportional to enzyme activity.
Cyclooxygenase assay protocol summary:
- add samples and standards to wells
- add reaction mix
- add arachidonic acid/NaOH solution
- analyze with microplate reader every 15 s for 30 min
This product is manufactured by BioVision, an Abcam company and was previously called K549 Cyclooxygenase (COX) Activity Assay Kit (Fluorometric). K549-100 is the same size as the 100 test size of ab204699.
Cyclooxygenase (COX), also known as prostaglandin-endoperoxide synthase (PTGS, EC 1.14.99.1), is an enzyme that is responsible for the formation of important biological mediators called prostanoids, including prostaglandins, prostacyclin and thromboxane. COX is the central enzyme in the biosynthetic pathway to prostanoids from arachidonic acid. There are two known isoenzymes: COX-1 and COX-2. COX-1 is constitutively expressed in many tissues and is the predominant form in gastric mucosa and in kidney. COX-2 is not expressed under normal conditions in most cells, but elevated levels are observed during inflammation. Pharmacological inhibition of COX by nonsteroidal anti-inflammatory drugs (NSAID) can provide relief from the symptoms of inflammation and pain.
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Terms & Conditions.
Measurement of COX-1 activity in absence (blue line) and presence of COX-1 inhibitor (SC560, red line) using the COS-1 positive control (PC) provided in the kit.
Typical Resorfurin Standard calibration curve.
Detection of endogenous COX-1 activity in J774 cell lysate (6 μg) and rat liver homogenate (210 μg).
Detection of endogenous COX-2 activity in J774 cell lysate (7 μg) stimulated with or without 100 ng/ml LPS and 100 ng/ml murine IFN-gamma.
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