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. 2016 May 13;11(5):e0155539. doi: 10.1371/journal.pone.0155539

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© 2016 Kim et al

This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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Fig 3 — Oxidation of PerR_BL (A), PerR2 (B), PerR3 (C), Fur_BL (D), and Zur_BL (E) before and after H₂O₂ treatment. E. coli cells expressing PerR_BL (LE0008), PerR2 (LE0002), PerR3 (LE0001), Fur_BL (LE0009), or Zur_BL (LE0010), were treated with or without 1 mM H₂O₂ for 1 min. Oxidation status of proteins was analyzed by MALDI-TOF MS after SDS-PAGE fractionation and in-gel tryptic digestion. Asterisks represent peptides containing one (PerR_BL and PerR3), two (PerR2 and Fur_BL), or three (Zur_BL) carboxyamidomethylated cysteine residues.