While all defined T cell subpopulations (Figure 4) encompassed cells from both donors (Figures 6A and 6B), the CLL-derived T cell pools had lower numbers of proliferating cells, but higher numbers of γδ, CD4+, CD8+ Tem, and CD4+ memory T cells (Figures 6A and 6B). This evidence concerns the gene CD4 and B-cell chronic lymphocytic leukemia.