1.14.11.17 - 1.14.11.17 DEAE-Sepharose column chromatography and HP phenyl-Sepharose column chromatography 1.14.11.17 dialysis against 25 mM Tris buffer at pH 8.0 1.14.11.17 recombinant His-tagged TauD from Escherichia coli strain BL21(DE3) by nickel affinity chromatography 1.14.11.17 recombinant protein using His-tag 1.14.11.17 Resource-Q anion-exchange column chromatography and Superdex 200 gel filtration 1.14.11.17 two-step purification from overexpressing Escherichia coli to apparent homogeneity