How photosynthetic microbes regulate CO2 fixation and carbon metabolism in response to fluctuating environments is of fundamental and industrial relevance. In this issue, Lu et al. uncover a cryptic enzymatic function that accelerates the shutdown of the Calvin cycle under a transition into the dark.
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Santos-Merino, M., Ducat, D.C. Switching off the lights to illuminate a photosynthetic brake in cyanobacteria. Nat Metab 5, 1078–1079 (2023). https://doi.org/10.1038/s42255-023-00827-6
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DOI: https://doi.org/10.1038/s42255-023-00827-6