V Ensure that the apparatus is working. The electrophoresis should take 60 to 90 minutes. Turn the power down to 0. Turn off the power pack. Unplug the cables.
Visualization Wear gloves for the rest of experiment.
Cover your working area with piece of paper towel. Ethidium bromide is mutagenic. Pour enough of the working solution of ethidium bromide onto the gel to cover it. The gel should stain for about 20 minutes Remove the ethidium bromide solution with the syringe provided and replace in the bottle. Cover the gel with distilled water.