3.2.1.164 CM-32 column chromatography, DEAE-Sepharose column chromatography and Sephadex G-100 gel filtration 3.2.1.164 native enzyme 26.2fold to homogeneity by several chromatographic steps, overview 3.2.1.164 native enzyme form a commercial cellulase preparation, 57fold to homogeneity by ammonium sulfate fractionation, two steps of ion exchange chromatography, and gel filtration 3.2.1.164 native enzyme from commercial pectinase preparation by anion and cation exchange chromatography, ultrafiltration, and gel filtration 3.2.1.164 recombinant His6-tagged enzyme from Escherichia coli strain Bl21 by two steps of metal chelating chromatography, the thioredoxin tag is cleaved off 3.2.1.164 recombinant maltose-binding-protein fusion enzyme from Escherichia coli strain DH5alpha, by cation exchange and amylose affinity chromatography, followed by hydrophobic interaction chromatography, native enzyme 88fold from strain S12 culture filtrate by anion exchange and hydrophobic interaction chromatography, followed by cation exchange chromatography, dialysis and gel filtration