Fig. 1
From: Significance of long chain polyunsaturated fatty acids in human health
Biosynthetic route of fatty acids requiring the essential LA (linoleic acid) and ALA (alpha-linolenic acid) with the different variations and steps. des desaturase, elo elongase; ARA (arachidonic acid), DGLA (dihomo-gamma linolenic acid), DHA (docosahexaenoic acid), DPA (docosapentaenoic acid), DTA (docosatetraenoic acid), EPA (eicosapentaenoic acid), ETA (eicosatetraenoic acid), GLA (gamma-linolenic acid), SDA (stearidonic acid)