Abstract
Three aryl alcohol oxidases (AAOs; EC 1.1.3.7) I, II, and III from the culture filtrate of a strain of white-rot fungus Pleurotus ostreatus were purified by multistep chromatography. Each of the purified AAOs I, II, and III had the same molecular masses of 70kDa and 72kDa on gel filtration chromatography and sodium dodecyl sulfatepolyacrylamide gel electrophoresis, respectively. Their optimum temperature was 40°C, but their optimum pHs differed slightly. The N-terminal amino acid sequence of AAOs I, II, and III was determined to be Ala-Asp-Lys- Asp-Tyr-Ile-Val-Val-Gly-Ala, which showed significant similarity to those of Pleurotus eryngii (80% identity) and Pleurotus ostreatus Florida (60% identity)
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