homeostasis/metabolism
• there is a marked decrease in cholesterol in newborns
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integument
• phenotype of newborn mutant epidermis is identical to that observed in Rxr loss-of-function newborns
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• sqaumes from newborn mice display a smooth surface with small or lacking corneodesmosomes (CDs), compared to wild-type which have numerous regularly spaced plaques corresponding to CDs
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• skin of newborns appears dull
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