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. 2014 May 22;8(5):e2885. doi: 10.1371/journal.pntd.0002885

Figure 6. Intra- and inter-subtype variations in protease activity in Blastocystis.

Figure 6

Protease activity of Blastocystis ST-4 and ST-7 isolates was determined by azocasein assays. Except isolate G, most of ST-7 strains exhibited significantly higher protease activities than the two ST-4 isolates (p<0.01). PBS as a background control showed activity that was significantly lower when compared to protease activities of all the isolates (p<0.01). Note that cysteine protease inhibitor iodoacetamide (IA) abolished protease activity of all the isolates, which is comparable to PBS. ##, p<0.01 vs. ST-4; ‡, p<0.01 vs. PBS control. Each value represents mean of six samples, taken from three independent experiments. Error bars represent the standard errors.