Expression of Xcl1 and XCL2 (human) across CD8 ⁺ T cell subsets. (A) Xcl1 gene expression in P14 T cells derived from indicated studies. Top left: Expression data during LCMV-Cl13 chronic viral infection and B16 melanoma challenge in indicated subsets. Top right: Expression data during LCMV-Cl13 in indicated subsets and time points. Bottom left: Expression data during LCMV-Cl13 using alternative gating scheme. (B) Splenic CD8⁺ T cell gene expression of Xcl1 and CD69 using different tissue digestion methods. (C) Expression data from CD8⁺ T_RM during LCMV-Arm (left) and XCL1 and XCL2 gene expression in human CD8⁺ T cells in indicated subsets (right). P values shown. Two-way ANOVA (A–C).