Predicted to enable oxidoreductase activity, acting on paired donors, with oxidation of a pair of donors resulting in the reduction of molecular oxygen to two molecules of water. Predicted to be involved in lipid metabolic process. Predicted to act upstream of or within fatty acid biosynthetic process. Predicted to be located in endoplasmic reticulum and membrane. Predicted to be integral component of membrane. Is expressed in jaw; olfactory epithelium; and submandibular gland primordium. Orthologous to human FADS2B (fatty acid desaturase 2B, pseudogene). [provided by Alliance of Genome Resources, Apr 2022]