Samiksha Jaiswal

Eicosatetraenoic acid

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Eicosatetraenoic acid wwwchemicalbookcomCASGIF24880408gif
Classification  Omega-6 fatty acid, Omega-3 fatty acid

What does eicosatetraenoic acid mean

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


See Essential Fatty Acid for nomenclature.

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

  • all-cis 5,8,11,14-eicosatetraenoic acid is an ω-6 fatty acid with the trivial name arachidonic acid. It is formed by a desaturation of dihomo-gamma-linolenic acid (DGLA, 20:3 ω-6).
  • all-cis 8,11,14,17-eicosatetraenoic acid is an ω-3 fatty acid. It is an intermediate between stearidonic acid (18:4 ω-3) and eicosapentaenoic acid (EPA, 20:5 ω-3)
  • 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.

    Medical vocabulary what does 12 hydroxy 5 8 10 14 eicosatetraenoic acid mean


    Eicosatetraenoic acid Wikipedia

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