DNA from both types of cells was extracted and purified
using a DNA extraction kit (Qiagen, Chatsworth, CA, USA)
according to the manufacturer’s protocol. The resultant purified
DNA was stored at 20 C until DNA electrophoresis.
Isolated DNA samples were subjected to electrophoresis on
a 0.8% agarose gel for 45 min at 100 volt. The gel was visualized
under UV light following ethidium bromide staining to
determine DNA fragmentation.