Expression of ex vivo cell surface markers among HIV-1-positive subjects. Expression of IL-7Rα, Fas, CD69, HLA-DR, and CD38 was among HIV-1-positive CSW cohort participants. Values are expressed as a percentage of the parental (A) CD4+ or (B) CD8+ T cell population, as indicated. CD69 plots are representative of two distinct studies, CD38 plots represent three distinct studies and HLA-DR plots represent four distinct studies. There were no significant differences in expression levels between GNB3 825CC/CT and 825TT groups as measured by Mann-Whitney test [p > 0.1 for all].