Table 4. Apoptosis postirradiation in colonies or potential colonies of HaCaT cells treated with l-deprenyl (mean percent apoptotic cells averaged over 100 colonies or potential colonies).

	Preirradiation		48 h Postirradiation		9 Days postirradiation
Treatment	Cells per colony	Apoptosis%	Cells per colony	Apoptosis%	Cells per colony	Apoptosis%
0 Gy control	1	0	3.6±0.12	0.2±0.03	268±32	0.24±0.03
0.5 Gy	1	0	1.1±0.14	25.6±4.6	165±16	2.15±0.34
5 Gy	1	0	1.4±0.19	32.1±2.9	126±13	2.93±0.8
0 Gy+10−9 M l-deprenyl	1		3.7±0.08	0.1±0.008	374±30	1.1±0.07
0.5 Gy+10−9 M l-deprenyl	1	0	3.2±0.41	0.24±0.04	321±35	0.86±0.05
5 Gy+10−9 M l-deprenyl	1	0	2.6±1.1	1.22±0.3	274±19	0.75±0.06