The nuclear genome encodes the remaining mitochondrial proteins, which are then transported into the mitochondria. The genomes of these organelles have become far smaller than those of their free-living predecessors. This is mostly due to the widespread transfer of genes from prokaryote progenitors to the nuclear genome, followed by their elimination from organelle genomes.
The nuclear genome encodes the remaining mitochondrial proteins, which are then transported into mitochondria. The genomes of these organelles have become smaller than those of their free-living predecessors. This is primarily due to the transfer of genes from prokaryotic progenitors to the nuclear genome and subsequent elimination from organelle genomes.