Other checkpoint molecules, including CD28 (TP44), CD86 (B7‐2), CD273 (PD‐L2), CD279 (PD‐1), and CD366 (TIM3) were not detected on resting or IFN‐G‐exposed CML LSC (Table S6) and IFN‐G failed to induce expression of any of these checkpoint molecules in KU812 or K562 cells (Table S6). The gene discussed is PDCD1; the disease is chronic myelogenous leukemia, BCR-ABL1 positive.