Immobilization of ?-galactosidase from Aspergillus Oryzae on Macroporous PloyGMA Newly Prepared

Sufang Sun, Lingyun Dong, Xiaobing Xu, Shigang Shen


The reactive, macroporous and massive epoxy group-containing polyGMA was synthesized simultaneously with
methanol aqueous solution and nano-calcium carbonate as porogen by bulk copolymerization. After the polymer was
smashed, particles with diameters in the range of 0.30 to 0.45mm were taken as the carrier and the Scanning electron
microscopy (SEM) micrographs were done to characterize its surface structure. Under the optimum conditions,
?-galactosidase was immobilized on the supporter obtained above, the basic property and the kinetic data of all the
immobilized enzyme were determined, and satisfactory results were obtained in enzyme activity, activity yield, pH
stability, thermal stability, operational stability, and Michaelis constants Km. The conclusion obtained indicated that the
ployGMA prepared concurrently with liquid and solid porogen was more suitable to immobilize enzyme than that
purely with liquid solution as pore-forming agent.

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International Journal of Chemistry   ISSN 1916-9698 (Print)   ISSN 1916-9701 (Online)

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