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. Author manuscript; available in PMC: 2010 Jan 24.
Published in final edited form as: J Immunol. 2009 Apr 15;182(8):4499–4506. doi: 10.4049/jimmunol.0802740

FIGURE 1.

FIGURE 1

Mouse and human MDSC are heterogeneous populations of immature myeloid cells. Subpopulations of MDSC display different constellations of cell surface and intracellular markers and suppress by different mechanisms. This diversity is likely due to different combinations of factors produced by histologically distinct tumors that cause myeloid cells to arrest at different stages of differentiation.