<Dd> 3.2 Matrix ◄ You are here </Dd> <P> 4 Mitochondrial DNA 5 Matrix granule 6 Ribosome 7 ATP synthase </P> <P> In the mitochondrion, the matrix is the space within the inner membrane . The word "matrix" stems from the fact that this space is viscous, compared to the relatively aqueous cytoplasm . The mitochondrial matrix contains the mitochondria's DNA, ribosomes, soluble enzymes, small organic molecules, nucleotide cofactors, and inorganic ions . The enzymes in the matrix facilitate reactions responsible for the production of ATP, such as the citric acid cycle, oxidative phosphorylation, oxidation of pyruvate and the beta oxidation of fatty acids . </P> <P> The composition of the matrix based on its structures and contents produce an environment that allows the anabolic and catabolic pathways to proceed favorably for . The electron transport chain and enzymes in the matrix play a large role in the citric acid cycle and oxidative phosphorylation . The citric acid cycle produces NADH and FADH2 through oxidation that will be reduced in oxidative phosphorylation to produce ATP . </P>

Where is the matrix located in the mitochondria