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Biocatalytic characterization of free and immobilized laccase from Trametes versicolor in its activation zone.
International Journal of Biological Macromolecules 2019 January 32
This investigation may be of interest for researchers working on the determination of several biocatalytic properties of the laccase from Trametes versicolor. So, We will treated the effects of pH, temperature, several organic components and heavy metals by performing enzyme assays in the presence of a 2,6 dimethoxyphenol (DMP) as substrate on the laccase activity. The optimum activity and temperature are 4 and 40 °C, respectively. The maximum rate of the reaction is 124.53 U/mg and the Michaelis constant is in order of 1.23 mM. The effect of metal ions on the laccase activity with a final concentrations range varying from 1 to 5 mM show that the Cu2+ ions increase the activity for concentration inferiors to 4 mM and the other metal ions have a relative influence on the laccase activity. Four tri-block copolymers based on poly(ethylene oxide) and poly(propylene oxide) and two polyethylene glycols are used to study the synthetic polymers effects on the enzymatic activity. Also, we have demonstrated that the laccase keeps 95% of its initial activity at 60 °C in the PEGDA8000 and PEGDA6000 gel matrix. The maximum rate of the immobilized laccase is approximately around 21.03 and 47.22% smaller than the free one.
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