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Fig. 7. Western blot analysis of IscU1 and mitochondrial marker VDAC-1 expression during Caco-2 cell differentiation. IscU1 and VDAC-1 protein levels from total, cytosolic (C.F.) and mitochondrial (M.F.) fractions of Caco-2 cells at day 4 and 13 of culture are shown.