Arachidonic acid (AA, ARA) is a polyunsaturated omega-6 fatty acid 20:4(ω-6). It is structurally related to the saturated arachidic acid found in Cupuaçu butter. It is a precursor to a large family of eicosanoids. Activator for several protein kinase C isotypes. BioVision’s Arachidonic Acid ELISA kit is a competitive ELISA assay for the quantitative measurement of Arachidonic Acid in serum, plasma and cell culture supernatants. The density of color is proportional to the amount of Arachidonic Acid captured from the samples.