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. 2024 Sep 5;25(17):9630. doi: 10.3390/ijms25179630

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© 2024 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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The cleavage activities of MazF-mt3 and mutant in the presence of inhibiting peptides. (A,B) The inhibitory effects of peptides (corresponding to the α3 (Leu46-Gly59), α4 (Thr60-Trp82) and α3–α4 helices (Leu46-Trp82) of MazE-mt3) on the RNase activities of WT MazF-mt3 (A); and the MazF-mt3 (Δ16–22) mutant (B). The numbers above the lanes indicated the molar ratios of peptide/toxin/RNA. Left: the gel-electrophoresis of the cleavage assays; Right: the quantification of the enzymatic activities, with the vertical axis indicating the cleaved fractions of the substrate.