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. 2023 Feb 2;19(4):507–517. doi: 10.1038/s41589-022-01244-8

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© The Author(s) 2023

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as 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 images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 1 — a, Degree of oxidation (OxD) of 100 nM Tum1-roGFP2 (left panel), roGFP2 (center panel) and Tum1(C259S)-roGFP2 (right panel), in response to increasing 3MP concentrations. b, Degree of oxidation of 100 nM Tum1-roGFP2, in response to increasing concentrations of l-cysteine (left panel), 3-mercaptolactate (center panel) and thiosulfate (right panel). c, H₂S release from 2.5 μM Tum1-roGFP2 on addition of 50 μM 3MP, as measured by an H₂S-selective electrode. d, The half-maximum inhibitory concentration (IC₅₀) values for LMW compounds acting as Tum1 sulfur acceptors. e, IC₅₀ values for proteins acting as Tum1 sulfur acceptors. All data are based on n = 3 independent experiments.

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