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Eicosatetraenoic acid


Eicosatetraenoic acid (ETA) designates any straight chain 20:4 fatty acid.

Two isomers, both of them essential fatty acids, are of particular interest:

Some chemistry sources define 'arachadonic acid' to designate any of the eicosatetraenoic acids. However, almost all writings in biology, medicine and nutrition limit the use of the term 'arachidonic acid' to all-cis 5,8,11,14-eicosatetraenoic acid (ω-6).

ETA is found in green-lipped mussel and appears to act as dual inhibitor of arachidonic acid oxygenation by both the cyclooxygenase (COX) and lipoxygenase pathway.



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