Twenty strains of the wood-degrading fungi from the genus Trametes Fr., capable of synthesizing laccases, were screened according to the changes in the oxidase activity in a submerged culture. The range of maximal efficiency of various species with respect to extracellular oxidase activity was determined. The absence of correlation between the oxidase activity in a submerged culture and the size of colored zone on agar media (Bavendamm reaction) was demonstrated. The most efficient strains, T. hirsita 56 and T. ochracea 92-78, were used to produce laccases, homogeneous according to SDS electrophoresis data. A number of biochemical parameters characteristic of these enzymes were determined.
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