Table 3. Comparison of radiation biological parameters between two groups (L–Q linearity quadri-model).

Group	α	β	α/β	SF2
IR	0.185	0.011	16.818	0.661
IR+HGFK1	0.344	0.011	31.273	0.481

Abbreviation: IR=ionising radiation. The radiobiological parameters of the IR- and IR+rHGFK1-treated groups for the linear quadratic (LQ) model. SF=e^{−αD−βD2}, α, β, α/β and SF2 were given by GraphPad Prism 5.0 based on the curve of LQ model, previously.