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. 2023 Nov 22;12(23):2684. doi: 10.3390/cells12232684

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© 2023 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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Reaction mechanism postulated for the oxidation of H₂S by MetHb. Methemoglobin binds to H₂S and oxidizes it to a mixture of thiosulfate and hydropolysulfides.