≈1:4 matrix water:cytosol water
||Rat Rattus norvegicus
||Anastacio MM et al., Relationship between mitochondrial matrix volume and cellular volume in response to stress and the role of ATP-sensitive potassium channel. Circulation. 2013 Sep 10 128(11 Suppl 1):S130-5. doi: 10.1161/CIRCULATIONAHA.112.000128 p.S131 left column 3rd paragraphPubMed ID24030396
|| Bakeeva LE, Chentsov YuS, Skulachev VP. Mitochondrial framework (reticulum mitochondriale) in rat diaphragm muscle. Biochim Biophys Acta. 1978 Mar 13 501(3):349-69PubMed ID629958
||Primary source  abstract: "Reconstitution of rat diaphragm mitochondria has been carried out with the use of the serial section technique."
||P.S131 left column 3rd paragraph: "The ratio of matrix water to cytosol water is ≈1:4, and
the influx of water into the mitochondria could cause depletion
in cytosolic inorganic phosphates, leading to an increased
rate of reactive oxygen species production, thereby benefiting
the myocyte [primary source]."