Back Ácido eicosatetraenoico Spanish Ácido eicosatetraenoico Galician Acido eicosatetraenoico Italian エイコサテトラエン酸 Japanese Eikozatetraenoinska kiselina Serbo-Croatian Eikozatetraenoinska kiselina Serbian 二十碳四烯酸 Chinese
Eicosatetraenoic acid (ETA) designates any straight chain tetra-unsaturated 20-carbon fatty acid. These compound are classified as polyunsaturated fatty acids (PUFA). The pure compounds, which are rarely encountered, are colorless oils. 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).
© MMXXIII Rich X Search. We shall prevail. All rights reserved. Rich X Search