Figure 2: ALL recognition of CD4+ T cells with phenotype positive to CD45RA and CCR7 markers. (a) Dot plots of ALL and ALL + gated cells showing frequency of CD45RO+ and CD45RA+ cells. (b) Representative histograms of CD45RA+ gated cells to analyze CCR7 frequency in both ALL and ALL + T helper cells. The numbers denote percentage of cells positive to the marker.