Figure 2

Effect of PER 2 and CRY 2 on the growth of MCF-7 cells. Cell proliferation assays were conducted on parental, vector-transfected, PER 2 overexpressing MCF-7 cells, CRY 2 overexpressing MCF-7 cells, and cells over expressing both PER 2 and CRY 2. Cells were counted on a hemacytometer using the trypan blue stain every day for four days. N = 3 independent experiments in triplicate. *a = p < 0.05 vs. pCS2+pCDNA3.1, *b = p < 0.05 vs. Per2, *c = p < 0.05 vs. pCS2