Fig. 3From: Retention of fatty acyl desaturase 1 (fads1) in Elopomorpha and Cyclostomata provides novel insights into the evolution of long-chain polyunsaturated fatty acid biosynthesis in vertebratesEvolutionary history and distribution of Fads1 and Fads2 in vertebrates, combined with the corresponding desaturase activities. Squares correspond to fads1 circle to fads2, black arrows indicate the approximate timing of whole genome duplications in the ancestral vertebrate (2R) and the teleost specific duplication (3R), grey square highlights lineages lacking fads1Back to article page