(A) A distinct set of cell adhesion molecules, leukocyte immunoglobulin-like receptors, and T cell activation biomarkers was up regulated predominantly in CD8+ T cells from SIVΔnef vaccinated macaques that displayed protective immunity to pathogenic SIVmac251 challenge (225-97 and 292-07). (B) Network diagram of known relationships between biomarkers of T cell activation that were up regulated in macaques 225-97 and 292-07 at 3 weeks PC. The network depicts co-stimulatory interactions and other functional relationships between IL2RG, IL7RA, FOS, LCK, STAT6, and CD69 that were identified utilizing the Ingenuity Pathway Analysis program.