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Cellulases were isolated from both healthyl(PC) and virus0infected penicillum chrysogenum(PCV) in the wheat bean culture, and some properties of the enzymes were studied. 1) At 37℃, pH 6,4 and 6day´s culture the maximal enzyme yield was obtained in both PC and PCV. 2) The optimum temperature for the PC cellulase was at 50℃, and that for the PCV enzyme was the same. 3) The optimum pH for the PC enzyme was at 5.0, whereas the PCV enzyme was at 6.0, indicating that they are isozymes. 4) When Na-CMC was used as a substrate, PC enzyme was twice as high as the activity of PCV enzyme.
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