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. 2022 Oct 13;8(10):1191–1201. doi: 10.1038/s41477-022-01253-4

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© The Author(s) 2022

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. 3 — a, Schematic view of PSI divarication. The pathway towards state transition or dimer is dependent on presence/absence of PsaH and Lhca2. b, Superposition of PSI dimer with PSI–LHCII shows that state transition (PDB ID: 7DZ8, transparent) would result in clashes of Lhca1 (top left) and PsaG (bottom left) with LHCII. PsaH (top right) and Lhca2 (bottom right) would clash with the Lhca9 from the neighbouring PSI monomer.