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. 2014 Jul 22;6(7):2162–2176. doi: 10.3390/toxins6072162

Figure 1.

Figure 1

pH-dependent efficacy of autoproteolytic cleavage of toxin A (TcdA) and TcdA fragments. (A) Inositol-hexakisphosphate (IP6)-induced cleavage of TcdA (308 kDa) and TcdA1–1065 (120 kDa) at pH 5.0 and pH 7.4. The TcdA-specific immunoblot illustrates unprocessed toxins and the cleaved glucosyltransferase domain (62 kDa); (B) Western blot (upper panel) and densitometric analyses (lower panel) reflecting the cleaved GT-domain of TcdA and TcdA1–1065 in dependence of pH. Data are presented as means ± SD (n = 3).