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- W1567227084 abstract "The extracellular endo-1,4-beta-glucanase components of Ruminococcus flavefaciens FD-1 were analyzed by high-performance liquid chromatography (HPLC) by using DEAE ion-exchange, hydroxylapatite, and gel filtration chromatography and polyacrylamide gel electrophoresis (PAGE). Two endo-1,4-beta-glucanase peaks were resolved by DEAE-HPLC and termed endoglucanases A and B. Carboxymethyl cellulose (CMC) zymograms were achieved by enzyme separation using nondenaturing PAGE followed by incubation of the gel on top of a CMC-agarose gel. This revealed no less than 13 and 5 endo-1,4-beta-glucanase components present in endoglucanases A and B, respectively. Hydroxylapatite chromatography of endoglucanases A and B revealed one activity peak for each preparation, which contained 4 and 5 endo-1,4-beta-glucanase components, respectively. Gel filtration chromatography of endoglucanase A following hydroxylapatite chromatography resolved the most active carboxymethylcellulase (CMCase) component from other endo-1,4-beta-glucanase activities. Gel filtration of endoglucanase B following hydroxylapatite chromatography showed one CMCase activity peak. Protein stains of sodium dodecyl sulfate-PAGE and nondenaturing PAGE gels of endoglucanases A and B from hydroxylapatite and gel filtration chromatography revealed multiple protein components. When xylan was substituted for CMC in zymograms, identical separation patterns for CMCase and xylanase activities were observed for both endoglucanases A and B. These data suggest that both 1,4-beta linkage-hydrolyzing activities reside on the same polypeptide or protein complex. The highest endo-1,4-beta-glucanase-specific activities were observed following DEAE-HPLC chromatography, with 16.2 and 7.5 mumol of glucose equivalents per min per mg of protein for endoglucanases A and B, respectively.(ABSTRACT TRUNCATED AT 250 WORDS)" @default.
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- W1567227084 title "Assessment of the endo-1,4-beta-glucanase components of Ruminococcus flavefaciens FD-1" @default.
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- W1567227084 doi "https://doi.org/10.1128/aem.56.6.1844-1850.1990" @default.
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