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. 2018 Mar 14;11:182. doi: 10.1186/s13071-018-2704-0

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© The Author(s). 2018

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 3 — Kallikrein activity assay. Cleavage of kallikrein substrate (H-D-Pro-Phe-Arg-pNa) by living schistosomes (triangle) and human kallikrein (0.02 μg) in the presence (square) or absence (circle) of PMSF (2 mM) (Mean +/- SD, n = 3). Released pNa was measured every 5 minutes at OD₄₀₅. All conditions differ significantly from “Kallikrein”; two-way ANOVA: F_(24,52) = 94.76, F_(2,52) = 2318.22, F_(12,52) = 124.82, P < 0.0001