Numerically denoted phenotypic marker expression from SPADE analysis of
the consistently observed myeloid derived suppressor cell (MDSC) subpopulations
(annotations 1–5) in the peripheral blood (PB) of normal donors and
cancer patients, and cancer patients’ spleens (Fig. 5). Relative antibody marker expression is shown
for all three flow panels (CTLA-4, PD-L1, and enzyme) and ranges from low (blue)
to high (red). The median and range of the phenotypic marker expression can be
referenced in ST 3.