c("culture condition: monolayer (m) cultured cell", "knock down: hCD24 knock down (KD)", "type of cd24: CD24-", "cell line: MCF7")
c("culture condition: sphere (s) forming cell", "knock down: wild type (WT)", "type of cd24: CD24+", "cell line: MCF7")
c("culture condition: sphere (s) forming cell", "knock down: hCD24 knock down (KD)", "type of cd24: CD24-", "cell line: MCF7")