(B) Fusion and fission time chart for individual mitochondria. Individual mitochondria tagged with mtPA‐GFP were monitored for a period of 1 h and the occurrence of fusion and fission was recorded. Mitochondria in INS1 and COS7 cells spend 77s (±71 s) and 87 s (±78 s), respectively, in the post‐fusion, connected state, and an average of 1434s and 1172 s, respectively, in the solitary, post‐fission state. 