Compounds with a phenol group will form a blue, violet, purple, green, or red-brown color upon addition of aqueous ferric chloride. This reaction can be used as a test for phenol groups. Mix several ...

Extract the reactions with phenol/chloroform (1:1, v/v), recover the DNA by precipitation with ethanol and dissolve the DNA pellets in 50 μl of water. Set aside 3-μl aliquots for use as controls ...