The Endosymbiosis of Cells

Endosymbiodes are protobacteriose, 3 billion years ago, they decided to fuse basically with percaryotes and those cells became eukaryotes. They contain key enzymes that participate to phospholipid biosynthesis. And so in order to get full compliments of phospholipids like phosphatidylcholine or phosphatidylethanolamine, you actually need active lipid exchange between organelles. We think we identify one of the mitochondria fission factor that explains why mitochondrids are so small in axons.