IL7 and neoplasm: By the 48-hour timepoint, IL-7–ALT T cells made up approximately 20% of all T cells in tumor, (Figure 3D, mean 18.8%, SD ±4.3%, n = 5), while the fraction of T cells that consisted of IL-2 ALT in tumors was approximately 1% (mean 1.7%, SD ±1.5%, n = 4).