Within glioblastoma-infiltrating T cells, a large proportion of cells were positive for CXCR4 and the proportion of cells positive for chemokine receptors CCR4, CCR5, CCR6, CCR7, CXCR3, and CXCR6 ranged between 5-25% (Figure 1C). The gene discussed is CXCR4; the disease is glioblastoma.