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- W4308013605 abstract "In this study, the xanthine oxidase (XO) enzyme was purified by affinity chromatography technique using Sepharose-4B-L-tyrosine-4-aminobenzamidine gel and its immobilization with glutaraldehyde was investigated. Using ammonium sulfate precipitation and affinity gel, xanthine oxidase was purified 643.04-fold in an 11.5% yield. The purity of the enzyme was checked by SDS polyacrylamide gel electrophoresis and a single band around 150 kDa was observed. KM (the Michaelis constant) and VMax (the asymptotic reaction velocity at infinite substrate concentration) of the enzyme were determined at 1.67x10-4 M and 0.56 U/mL.min respectively by using a xanthine compound as a substrate. The in vitro effects of NH4F, NH4Cl, CaCl2, ZnCl2, HgCl2, Hg(NO3)2.H2O compounds and commercially named colchicum dispert, commonly used in the treatment of gout disease in the clinic, were investigated. The IC50 values of compounds showing inhibition effects were determined. Afterward, XO was immobilized with glutaraldehyde. The highest XO activity was observed in the sample of the immobilized enzyme at a rate of 6% glutaraldehyde. The kinetic constants (KM and VMax) of the immobilized enzyme were determined as 5.18x10-4 M and 0.73 U mL-1 min-1 respectively. These values revealed that the catalytic activity of the free enzyme was higher than the immobilized enzyme." @default.
- W4308013605 created "2022-11-07" @default.
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- W4308013605 date "2022-10-31" @default.
- W4308013605 modified "2023-09-30" @default.
- W4308013605 title "Purification of Xanthine Oxidase Enzyme and Investigation of Its Immobilization with Glutaraldehyde" @default.
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- W4308013605 doi "https://doi.org/10.19159/tutad.1084383" @default.
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