Figure 5. Bregs from HIV_EC and HIV_ART subjects exhibit comparable endogenous levels of PD-L1.

In PBMC (n = 15) of HIV_EC, HIV_ART, HIV_NEG, and HIV_VIR, endogenous levels of PD-L1 expression on (a) Bregs and (b) Bregs compared to the other B-cell subsets were determined by flow cytometry. Boxes represent 25^th to 75^th percentiles, whiskers indicate minimum and maximum values and the lines indicate the median. P values (Graphpad Prism software) are indicated; * = p<0.05, ** = p<0.005, *** = p<0.0005.