Laccase and Tyrosinase in some Wood-rotting Fungi

Several species of wood-rotting fungi have been examined forphenol oxidases. Polystictus sanguineus, a white rot, produceslaccase, secreting it into the medium. This enzyme has beenstudied and partly purified. Phellinus cryptarum, another whiterot, shows varied production of phenol oxidase according tothe medium used for growth. Laccase only is produced on maltmedium, whereas laccase and tyrosinase result after growth ona glucose and salt medium. Lentinus lepideus, a brown rot, producestyrosinase on several media and this enzyme appears to be entirelyintracellular.