Figure 2. Effect of 5-azaC on the colony-forming ability of NPC cells in vitro.
Clonogenic survival of CNE2 and SUNE1 cells irradiated with a single-dose of 0, 2, 4, 6, 8 Gy after pretreatment with 1 μmol/L (5-azaC +IR) or PBS (IR).
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