Fig. 3From: Characterization of fatty acid desaturases reveals stress-induced synthesis of C18 unsaturated fatty acids enriched in triacylglycerol in the oleaginous alga Chromochloris zofingiensisGC–MS chromatography of fatty acids from S. elongatus expressing the empty vector pSyn6, CzFAD7A or CzFAD7B without or with FFA feeding. a Without FFA feeding. b With C18:1Δ9 feeding. c With C18:2Δ9,12 feeding. d With C18:3Δ6,9,12 feeding. Newly synthesized and added fatty acids are designated in red and blue, respectively. The mass spectra of C16:2Δ9,13, C18:2Δ9,15 and C18:2Δ11,15 are shown in Additional file 2: Figure S8Back to article page