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Diatom pyrenoids are encased in a protein shell that enables efficient CO2 fixation

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Pyrenoids are subcompartments of algal chloroplasts that increase the efficiency of Rubisco-driven CO2 fixation. Diatoms fix up to 20% of global CO2, but their pyrenoids remain poorly characterized. Here, we used in vivo photo-crosslinking to identify pyrenoid... ...