Fig. 2. Ectopic expression of human (Hs) Orc1, Orc3, Orc4, Orc5 and Orc6 induced loss of cell adhesion under conditions where ectopic expression of HsOrc2 did not. (A) HeLa cells were transfected with 1 µg of the plasmid indicated (pFHsOrc1 or pFHsOrc1) and then incubated for the times indicated before determining the fraction of unattached cells. (B) HCT116 cells (±TP53 gene, as indicated by p53-/- and p53+/+) transfected with 1 µg of pFHsOrc1 for the times indicated. (C) CHO cells were transfected with the amount of plasmid DNA indicated and then incubated for 36 hours before determining the fraction of unattached cells.