Brief Reports
Copyright ©The Author(s) 2004.
World J Gastroenterol. Sep 15, 2004; 10(18): 2756-2758
Published online Sep 15, 2004. doi: 10.3748/wjg.v10.i18.2756
Table 1 Purification of C. difficile toxin A
Purification stepVol (mL)Protein(mg/mL)Lethal dose(Mice, MLD/mL)Cytotoxicity (CU/mg)
Crude culture supernatant2001.866 × 1041010
50% (NH4)2SO4 precipitation10NDNDND
Acid precipitation106.152 × 1061010
DEAE-Toyopeal 650 mol/L60.8811 × 106107