When added alone AraC and D2/CA combination significantly increase VDR, expression and this is enhanced in both cell lines when the 1-D2/CA combination follows AraC treatment, as expected. C/EBP β expression is also increased by AraC, but is enhanced by 1-D2/CA only in U937 cells. The Crk-L signal provided a loading control for the Westerns, which was used to determine the corrected OD for each signal. The bar chart below each blot shows the Mean and SD of replicate blots, #= p< 0.05 vs untreated control; * = p< 0.05 vs AraC alone; n=3.