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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 (http://creativecommons.org/licenses/by/4.0/).
Cell viability of Caco-2 cells after 4 h incubation at 37 °C with PAA and s-protected thiolated PAA conjugates at indicated concentrations using resazurin assay. The data are shown as mean ± SD (n = 3).