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Amylomyces rouxii eliminated 85% of initial pentachlorophenol (PCP) at 12.5 mg l(-1) when grown with 0.1 g tyrosine l(-1), but only 55% without tyrosine. Addition of tyrosine in the culture medium increased the monophenolase activity by 1.8-fold. Tyrosinase is thus indicated to be the phenoloxidase involved in PCP degradation by A. rouxii .

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BACKGROUND: The aim of this study was to investigate the ability of a zygomycete isolated from pentachlorophenol (PCP)-contaminated soil to produce peroxidase and phenoloxidase enzymes, and to determine the effect of tyrosine and PCP on the enzyme activities. The ability of the isolate to tolerate and remove PCP was also studied.