The pep-ck type refers to a specific class of phosphoenolpyruvate carboxykinase (PEPCK) that plays a critical role in the C4 and CAM pathways of carbon fixation. This enzyme catalyzes the conversion of oxaloacetate to phosphoenolpyruvate, a key step in efficiently capturing carbon dioxide in plants that have adapted to arid or high-temperature environments. Understanding this enzyme is crucial for comprehending how certain plants maximize photosynthetic efficiency under challenging conditions.
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