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. 2018 Feb 19;9(3):287. doi: 10.1038/s41419-018-0331-5

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© The Author(s) 2018

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. 7 — Oxidized (GSSG, a) and total glutathione levels b were measured in A2E-loaded cells after a 15-h light exposure. Glutathione ratios (GSH/GSSG, c) were calculated according to the manufacturer’s instructions. n = 3. Differences between samples and dark controls were considered to be significant when p < 0.05 (▲/*), p < 0.01 (▲▲/**), or p < 0.001 (▲▲▲/***). Triangles (▲) refer to the difference with the untreated dark control and stars (*) to A2E-treated dark control. Each 10 nm spectral band is designated by its central wavelength