A screening test for phenoloxidases from edible mushrooms was done on potat
o dextrose agar plates that contained phenolic chemicals. Many edible mushr
ooms showed positive reactions on the agar plates. Among them, Auricularia
auricula-judae, Clitocybe nebularis, Lentinus edodes, Pholiota aurivella, a
nd Pseudohiatula oshimae produced a considerable amount of phenoloxidases,
and these enzymes showed maximum activities in the acidic pH region.