Figure 1.

Cell death of K1 cells in culture with ¹³¹I. The graph presents the percentages of K1 cells undergoing apoptotic or necrotic death processes, as assessed by flow cytometry directly after 24 h of ¹³¹I exposure (5, 10, 20 Gy) or after additional 72 h of culture without ¹³¹I. The culture was performed parallel with or without TSH stimulation. I—intact cells, EA—early apoptosis, LA—late apoptosis, N—necrosis.