Mitochondrial matrix
The cytosolic, intermembrane space, compartment has a water content of 3.8 μl/mg protein, while the mitochondrial matrix 0.8 μl/mg protein. It is not known how mitochondria maintain osmotic balance across the inner mitochondrial membrane, although the membrane contains aquaporins that are believed to be conduits for regulated water transport. Mitochondrial matrix has a pH of about 7.8. Mitochondrial DNA was discovered by Nash and Margit in 1963. One to many double stranded mainly circular DNA is present in mitochondrial matrix. Mitochondrial DNA is 1% of total DNA of a cell. It is rich in Guanine and Cytosine content. Mitochondria of mammals have 55s ribosomes.
Roger Hendrix (biologist)
Roger W. Hendrix (July 7, 1943 – August 15, 2017) was an American biologist, focusing in bacteriophage biology, and a Distinguished Professor at University of Pittsburgh.. He studied biology at the California Institute of Technology and went on to obtain his Ph.D. from Harvard University under the supervision of James Watson, the co-discoverer of the structure of DNA. In 2009, he received the NAS Award for Scientific Reviewing.