ATP synthase surface area assumed to be maximum associated with the inner ring, 6.4 × 10−5 m2 for bacteria, 1.1 × 10−4 for eukaryotes. : cell volume (in μm3); : cellular surface area (in μm2); : raw protein complex copy number estimates; : corrected protein complex copy number estimates; : correction factor; : packing density (copies/μm2); : fraction of : cell division time (hours); , , : costs of building a cell per in 109 ATP equivalents; : growth; : maintenance (per hours); : total; and : maximum (all ATP equivalents) and reduced (without ATP equivalents expended in the form of NADH/NADPH/FADH2) required rate of ATP synthesis (per complex per second) to satisfy lifetime energy requirements.