c("cell line: MCF-7", "cell type: breast cancer cell line", "treated with: vehicle (0.1% EtOH) as control for 24hrs")
c("cell line: MCF-7", "cell type: breast cancer cell line", "treated with: E2 (10-9mol/L)for 24 hrs")
c("cell line: MCF-7", "cell type: breast cancer cell line", "treated with: 4-OHT (10-6mol/L) for 24 hrs")