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Alignment of the predicted amino acid sequences of the zebrafish desaturase (DRD5/6) and human Δ5 (HSFADS1) and Δ6 desaturases (HSFADS2). The three ORFs encode 444 amino acid residues. Identical amino acids are in black, the cytochrome b5-like domain is underlined by asterisks, and the three histidine-rich domains are underlined.
