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. 2020 Oct 8;11:5081. doi: 10.1038/s41467-020-18867-x

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© The Author(s) 2020

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. 4 — a Superposition of the structures of 24 FCPIs. b Abnormal FCPI-1 (magenta) structure superposed with the structure of FCPI-7 (cyan). The pigments of FCPI-1 were labeled. Large deviations of protein structures between FCPI-1 and FCPI-7 (Lhcr1 protein) induce large shift of the pigments in FCPI-1. c Top view of typical Chl sites in FCPI-7 (Lhcr1 protein) from stromal side. d, e Numbering of the 24 Chl sites of diatom FCPIs with the top view (d) and side view (e), respectively. Green and blue Chls are Chls a and Chls c, respectively. The blue cycle in d indicates the Chl 416 site that can coordinate both Chl a and Chl c (see Supplementary Table 2). Different colors of Chl 408/401 also indicate these two sites can coordinate both Chl a and Chl c (Supplementary Table 2). f Top view of typical Car sites in FCPI-7 (Lhcr1 protein) from stromal side. The Fx306/307 sites typically seen in Lhcf-type antennae^8,21 are highlighted by circles. g, h Numbering of Car sites of diatom FCPIs with top view (g) and side view (h), respectively.