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. 2023 Feb 15;14:846. doi: 10.1038/s41467-023-36460-w

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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. 2 — a Side view along the membrane plane with the periplasm above and the cytoplasm below. Color scheme: BChl a, red sticks; spheroidenes (group-A), yellow sticks; spheroidenes (group-B), orange sticks; BPhe a, magenta sticks; UQ-10, purple sticks; non-heme Fe, magenta sphere. b Top view from periplasmic side of the membrane with the same color scheme as in (a). One additional BChl a and two additional ubiquinones (Q_C and Q_D) were detected in the LH1–RC structure. Arow indicates the extra BChl a. c Close contacts (<4.0 Å) between the extra BChl a and surrounding residues, and Mg–Mg distance between the extra BChl a and the nearest LH1-BChl a. Color scheme as in Fig. 1a except for myristate in gray. d All four of ubiquinones (Q_A, Q_B, Q_C and Q_D) were detected in the LH1–RC structure. The density maps are shown at a contour level of 5.0σ.