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. 2021 Apr 20;72(13):4604–4624. doi: 10.1093/jxb/erab169

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© The Author(s) 2021. Published by Oxford University Press on behalf of the Society for Experimental Biology.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.

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Fig. 2. — Schematic representation of crosstalk between photosynthetic electron transport (PET), the Calvin–Benson–Basham (CBB) cycle, photorespiration (PR), and the carbon concentration mechanism (CCM) in Chlamydomonas. CCM components: inorganic carbon transporters and carbonic anhydrases, occurring in various parts of the cell are highlighted in grey. *The role of mitochondrial proteins CCP1, CCP2, CAH4, and CAH5 is hypothesized, and remains to be explored. Reactive oxygen species (ROS) generated during PET, and PR metabolites are hypothesized to act as signalling molecules for the CCM.