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Figure 3: Human and murine FcγRs are expressed on a variety of hematopoietic cells. Cells of the innate immune system express both activating and inhibitory FcγRs: monocytes, macrophages, DCs, basophils, eosinophils, neutrophils, NK cells, and mast cells. On the other hand, B cells uniquely express FcγRIIb both in mice and humans. *denotes that expression can be induced upon activation.