Peripheral blood mononuclear cell(MNCs)from healthy volunteer,HL-60,HepG2,293,HeLa,SGC7901,U266 and CEM were unmethylated; and K562,NB4,GMC,Jurkat seemed to have deletion or mutation of p15 gene.

• 正常人单个核细胞、HL-60、HeLa、HepG2、293、SGC7901、U266、CEM细胞则为p15非甲基化,而K562、NB4、GMC、Jurkat似乎显现p15基因缺失或突变。