COX4I1 and leukemia: Using the Seahorse XF Cell Mito Stress Test (Agilent) to measure the oxygen consumption rate (OCR), we found that depletion of COX4I1 severely diminished the mitochondrial respiration in all aspects, including the ATP‐linked respiration, maximal respiration, and the reserve respiration capacities in leukemia cells (Figures4A and S2, Supporting Information).