There's a specific page on Wikipedia about Mitochondrial DNA [1], where it is clearly said that: In the cells of extant organisms, the vast majority of the p

There's a specific page on Wikipedia about Mitochondrial DNA [1], where it is clearly said that: In the cells of extant organisms, the vast majority of the proteins in the mitochondria (numbering approximately 1500 different types in mammals) are coded by nuclear DNA, but the genes for some, if not most, of them are thought to be of bacterial origin, having been transferred to the eukaryotic nucleus during evolution. (citing [2]) [1] https://en.wikipedia.org/wiki/Mitochondrial_DNA https://en.wikipedia.org/wiki/Mitochondrial_DNA [2] https://doi.org/10.1016%2Fj.cels.2016.01.013 https://doi.org/10.1016%2Fj.cels.2016.01.013