Fig. 3

KIR and receptor expression in CD4⁺T cells of controls, moderate and severe CFS/ME participants. a KIR2DL5 expression in total CD4⁺T cells as represented by a percentage of total CD4⁺T cells (%). b Number of naïve CD4⁺T cells expressing KLRG1 in in control, moderate and severe CFS/ME participants shown as a number of cells per microliter (cells/μL). C BTLA4 receptor expression in central memory CD4⁺T cells of control, moderate and severe CFS/ME patients, presented as cells/μL. Data is represented as mean ± SEM. *represents results that were significantly different where p <0.05. KIR: killer immunoglobulin-like receptor; CFS/ME: Chronic Fatigue Syndrome/Myalgic Encephalomyelitis; KLRG1: killer cell lectin-like receptor subfamily G member 1; BTLA4: B and T lymphocyte attenuator SEM: Standard Error of the Mean