Function:Bifunctional enzyme which acts as both a sphingolipid delta(4)-desaturase and a sphingolipid C4-hydroxylase.,induction:Up-regulated during keratinocyte differentiation. Not expressed at day 0 or day 3 after differentiation, detected on day 6 and increases by day 9.,pathway:Membrane lipid metabolism; sphingolipid biosynthesis.,similarity:Belongs to the fatty acid desaturase family. DEGS subfamily.,tissue specificity:Highly expressed in skin, intestine and kidney.,
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