Figure 1b.

DNA damage visual classification, according to the relative proportion of DNA in the tail (cells between 0 and 4), provided from single-cell gel electrophoresis. “0” is undamaged cell, and “4” is the most heavily damaged cell. (a) Control cells, (b) positive control cells; treated only with 0.7 mM H₂O₂, (c) 50 μg/ml HRE + 0.7 mM H₂O₂, H₂O₂, HRE: Hypericum retusum fruit extract ; H₂O₂: Hydrogen peroxide