F) Representative electron microscopy micrographs of mitochondria from ES (n=49 sections) and 2-cell-like cells (n=57 sections) generated across 2 independent technical and biological replicates. Scale bar, 1 μm. Representative images from 2 independent biological and technical replicates are shown. 162 and 99 mitochondria were analysed for 2-cell-like and ES cells, respectively. 