Fig. 4.
Frequencies of chromosome-type CAs (A), chromatid-type CAs (B), and total CAs (C) in 51D1 cells (circles) and 51D1.3 cells (squares) after 150 and 300 cGy γ-irradiation plotted against fraction of cells in S phase. CA frequencies are normalized per unit dose; different symbol fill colors represent four independent experiments performed with each cell line.