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PPARγ restores adipogenesis in PPARγ−/− cells, but C/EBPα does not. (A) Dishes containing PPARγ flox/− or −/− cells were infected with retroviruses expressing PPARγ2, C/EBPα, or vector only. Cells were exposed to a prodifferentiative regimen with or without troglitazone, and stained with oil red O after 7 d. (B) Microscopic view of cells in A.
