Medical Genetics Human mtDNA is 16,569 bp; encodes a number of mitochondrial proteins Subunits 1, 2, and 3 of cytochrome oxidase Subunits 6,8 of the fo atpase Apocytochrome b subunit of CoQH2 Cytochrome C reductase Seven NADH-CoQ reductase subunitsMedical Genetics Human mtDNA is 16,569 bp; encodes a number of mitochondrial proteins • Subunits 1, 2, and 3 of cytochrome oxidase • Subunits 6, 8 of the Fo ATPase • Apocytochrome b subunit of CoQH2- Cytochrome C reductase • Seven NADH-CoQ reductase subunits