Fig. 4.
Effect of anaerobic growth on the mitochondrial copy number. mtDNA copy number is expressed as the relative value for cells during aerobic growth at the indicated time point. The approximate value of the mtDNA copy number shown here decreased with time during anaerobic growth. mtDNA copy number is a highly approximate value of the number of mitochondria and is not exact because of mtDNA concatemers (52) and mitochondria without mtDNA (48). Error bars indicate standard deviations.