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- W2057008364 abstract "A rapid and simple method was developed, using perfusion chromatography media, to separate the fruit-specific pectin methylesterase (PME) isoform from the depolymerizing enzyme polygalacturonase (PG) and other contaminating pectinases present in a commercial tomato enzyme preparation. Pectinase activities were adsorbed onto a Poros HS (a strong cation exchanger) column in 20 M HEPES buffer at pH 7.5. The fruit-specific PME was eluted from the column with 80 mM NaCl, followed by a step to 300 mM NaCl to elute PG activity. Rechromatography of the PME activity peak with a linear gradient further resolved two PME isoenzymes and removed residual traces of PG activity. The PG activity peak was further treated with lectin affinity chromatography to provide purified PG enzyme, which was separated from a salt-dependent PME (tentatively identified as a ubiquitous-type isoform), and a pectin acetylesterase. The later enzyme has not been reported previously in tomato. This method provides monocomponent enzymes that will be useful for studying enzyme mechanisms and for modifying pectin structure and functional properties." @default.
- W2057008364 created "2016-06-24" @default.
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- W2057008364 date "2001-07-31" @default.
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- W2057008364 title "PERFUSION CHROMATOGRAPHY SEPARATION OF THE TOMATO FRUIT-SPECIFIC PECTIN METHYLESTERASE FROM A SEMIPURIFIED COMMERCIAL ENZYME PREPARATION" @default.
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- W2057008364 doi "https://doi.org/10.1081/pb-100104907" @default.
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