A MSP primers were designed to the human ortholog of each indicated gene and validated using human placental DNA that was incubated in the presence or absence of SssI methylase prior to bisulfite conversion. B. MSP analysis of indicated genes was conducted on indicated human breast tumor cell lines. C. Pyrosequencing analysis of the ATP1B2 gene was conducted using genomic DNA harvested from MCF-7, BT-474, and human placenta (control). D. Pyrosequencing analysis of the SMPD3 gene in MDA-MB-231, BT-474 and control DNA. E. Pyrosequencing analysis of the DUSP2 gene in MDA-MB-231, BT-549 and control DNA. F. Pyrosequencing analysis of the FOXJ1 gene in MDA-MB-231, BT-474 and control DNA samples.