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M12 cells were transfected with PKC isoforms or Rab9 for 48 hrs and then analyzed by filipin staining for cholesterol storage. Cells positive for transfection stain positive for GFP (left panel) and show decreased filipin staining (outlined cells, right panel) compared to surrounding untransfected cells, confirming the role of PKCs in mobilizing stored cholesterol from the NPC1 endosomes. Bar, 20μ.
