Abstract
An aqueous two-phase system based on the two polymers poly(ethylene glycol) and dextran has been used for the fractionation of cellulase enzymes present in culture liquid obtained by fermentation with Trichoderma reesei. The activities of β-glucosidase and glucanases were separated to high degree by using the two-phase systems for a counter-current distribution process in nine transfer steps. While the glucanases had high affinity to the poly(ethylene glycol) rich top phase the β-glucosidase was enriched in the dextran-containing bottom phase. Multiple counter-current distribution performed indicates the heterogeneity of β-glucosidase activities assuming at least four isoenzyme forms. One step concentration of β-glucosidase by using system with 46:1 phase volume ratio resulted in 16 times higher enzyme activity.
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Brumbauer, A., Johansson, G. & Réczey, K. Fractionation of cellulase and β-glucosidase in a Trichoderma reesei culture liquid by use of two-phase partitioning. Bioseparation 7, 287–295 (1998). https://doi.org/10.1023/A:1008153418019
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DOI: https://doi.org/10.1023/A:1008153418019