Figure 2.

The HP-F1 antigen is expressed on CD56⁺ NK cells (23– 77% in six different donors), α/β T cells (3–28%), γ/δ T cells (16–50%), CD19⁺ B cells, CD14⁺ monocytes, HLA-DR^high DCs derived from CD34⁺ precursors, and CD1a⁺ DCs derived from monocytes under appropriate culture conditions. Macrophages derived in vitro from purified monocytes also expressed the HP-F1 antigen, whereas neutrophils were HP-F1⁻ (data not shown).