Table 1. Parameters of cellular radiosensitivity and cell cycle distribution.

					0 Gy			150 Gy
Cell lines	SF2a	α (Gy−1)b	β (Gy−2)b	Dbar (Gy)c	Gd1	S	G2/M	G1	S	G2/M
RT112	0.62±0.02	0.18±0.06	0.028±0.007	3.2±0.5	55	33	13	43	54	2
DU145	0.63±0.05	0.12±0.02	0.055±0.005	2.85±0.3	54	36	10	47	44	9
SSC4451	0.41±0.07	0.38±0.15	0.032±0.018	2.04±0.5	80	11	9	83	10	7
HeLa	0.43±0.03	0.33±0.06	0.043±0.007	2.1±0.2	70	18	12	43	40	17
LNCaP	0.17±0.01	0.87±0.06	0.014±0.011	1.11±0.1	78	15	7	68	23	9
T47D-B8	0.46±0.06	0.29±0.4	0.045±0.006	2.21±0.2	65	26	9	53	14	33
MCF-7	0.53±0.06	0.16±0.04	0.078±0.006	2.35±0.3	73	16	11	60	25	15
MCF7-BB	0.51±0.05	0.28±0.03	0.027±0.005	2.55±0.1	47	43	10	70	16	14
MCF7-Bus	0.31±0.03	0.52±0.03	0.03±0.005	1.64±0.1	76	14	10	52	3	13

^aSurviving fraction for a X-ray dose of 2 Gy.

^bLinear and quadratic term of the dose response.

^cD_bar, mean inactivation dose.

^dPercentage of cells in G₁, S or G₂M-phase 24 h after 0 or 150 Gy.