So basically, this reaction involves the carboxylation of that Pyruvate into oxyloacetate. And in step number two, or actually before step number two takes place, the oxylo acetate is transformed into malade. That then moves into the cytoplasm and the malade is transformed back into the oxyloacetate within the cytoplasm. And then step number two takes place and it is catalyzed by Pep carboxy kinase, where Pep stands for phosphorinl pyruvate carboxy kinase. So we form in step number two, phosphorinl Pyruvate. So step number one takes place in the mitochondrial matrix.