Additional HSC-sparing antigens —less extensively investigated and whose expression on AML cells remains to be fully characterized— include C–C Motif Chemokine Receptor 1 (CCR1) [21, 59], Leukocyte immunoglobulin-like receptor subfamily B member 2 (LILRB2) [21, 32], T cell activation increased late expression protein (Tactile/CD96) [60] and Tumor necrosis factor receptor superfamily member 1B (TNFRSF1B) [21]. The gene discussed is CCR1; the disease is acute myeloid leukemia.