Description_x000D_ Application_x000D_ Phosphoenolpyruvate carboxylase (PEPC) is an enzyme useful for enzymatic determination of carbon dioxide when coupled with malate dehydrogenase in clinical analysis. PEPC is also used to study carbon assimilation, post-translational regulation and allosteric regulation in various plants ._x000D_ Packaging_x000D_ 1000 units in poly bottle_x000D_ Biochem/physiol Actions_x000D_ Phosphoenolpyruvate carboxylase (PEPC) catalyzes the addition of bicarbonate to phosphoenolpyruvate (PEP) to form the four-carbon compound oxaloacetate and inorganic phosphate . In CAM and C4 plants, PEPC catalyzes the photosynthetic assimilation of CO2 into an organic acid. PEPC is activated by glucose-6-phosphate and is inhibited by malate and aspartate. PEPC comprises about 0.5-2% of the soluble protein in alfalfa and soybean nodules ._x000D_ Unit Definition_x000D_ One unit causes the oxidation of one micromole of NADH per minute at pH 8.0 at 30°C._x000D_ Physical form_x000D_ White amorphous lyophilized powder containing BSA and sugar alchohols as stabilizers.