Figure 2From: p53-independent early and late apoptosis is mediated by ceramide after exposure of tumor cells to photon or carbon ion irradiation Kinetics of apoptosis. A: quantified as the percentage of cells in the sub-G1 phase, in the four cell lines irradiated with 10Gy photons or with 33.4 or 184 keV/μm carbon ions. B: Kinetics of TUNEL positive cells, in the four cell lines irradiated with 10Gy photons or with 33.4 carbon ions. Values represent the mean ± SD of two or three independent experiments performed in triplicate *p < 0.05, **p < 0.01, and ***p < 0.001 compared to control.Back to article page