Not applicable. ω-3 Arachidonic Acid does not exist, as arachidonic acid is an omega-6 (ω-6) fatty acid, not omega-3. It is commonly mistaken due to the naming conventions of fatty acids. Arachidonic acid plays key roles in inflammation, cell signaling, and is a precursor to eicosanoids such as prostaglandins and leukotrienes. It is used in research related to immune response, inflammatory diseases, and cellular biology. However, it is not classified as an omega-3 compound.