Additionally, studies indicate that P14 cells (a type of CD8+T cell specific to the LCMV gp33 epitope presented on H-2Db) lacking BATF exhibit defects in differentiation into effector CD8+T cells in response to infection with monocytotropic Listeria monocytogenes or dendritic cell immunization stimulated by peptides [7]. This evidence concerns the gene CD8A and infection.