tsütosoolis paiknev ensüüm, mis katalüüsib CO2 seostumist fosfoenoolpüruvaadile oksaloatsetaadi moodustumisega, Is an enzyme in the family of carboxy-lyases found in plants (cytosole) and some bacteria that catalyzes the addition of bicarbonate (HCO3−) to phosphoenolpyruvate (PEP) to form the four-carbon compound oxaloacetate and inorganic phosphate. Important in photosynthesis of C4 plants