Oxphos™ gives a linear response for mammalian cells (0; 100,000; 200,000; 400,000; 600,000; and 800,000) plated in 1mL growth medium in a six well plate with up to 15% fetal bovine serum and measured 20 hours after plating. It also gives a linear response for human blood (0, 10, 20, 40, 60, 80, 100...