STUDY ON THE PROPERTIES OF POLY(?-HYDROXYBUTYRATE)DEPOLYMERASE / 微生物学通报

Three strains having degrading poly(?-hydroxybutyrate)(PHB) activity were isolated from activated sludge of different ecological environments and areas,named DS9701, DS9710 and DS9713.The properties of PHB depolymerase produced by DS9701, DS9710 and DS9713 were studied. All the PHB depolymerases are extracellular enzyme and are induced enzyme. The time that enzyme activities of the PHB depolymerases reach the maximum is 96 hours after inoculation. The apparent optimal temperature range for crude enzymes extract is 40℃～45℃.