CD8A and listeriosis: To evaluate whether Nrp1 expression directly regulated effector function of tolerant CD8+ T cells, WT Gag-specific T cells (CD90.1+) were co-transferred with nrp1f/f CD8+ T cells (CD90.1+/90.2+) into Alb∶Gag hosts with or without acute Listeria monocytogenes infection.