Fig. 3.
Comet assays. A) Normal human colon cells (NCM 460) were fed with fresh complete media alone, as a control or B) with 150 μM Hb for 4 h followed by a comet assay to assess DNA damage (DNAD) using a denaturing electrophoresis. C (a) (b) and (c), show an interpretation of the intensity of DNAD: a = undamaged cells, b = damaged cells and, c = severely damaged cells. D) Quantification of DNAD.