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Cosmarium subtumidum

Map of a culture of green algae (Cosmarium subtumidum) revealing the morphology of the pyrenoids, the main actors of the algal carbon concentrating mechanism. Pyrenoids improve the efficiency of photosynthesis by delivering carbon dioxide to RuBisCo, an enzyme concentrated at the heart of this micro-compartment. Surrounded by a typical starch sheath, the pyrenoid is pervaded by an intricate network of microtubules.
Cosmarium subtumidum
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