DCs are the only hematopoietic cells that express ESE-3. The expression of ESE-3 was analyzed by RT-PCR in (A) DC populations directly isolated from buffy coat preparations; in (B) bone marrow, isolated CD34⁺ peripheral-blood progenitor cells, and purified resting or activated B cells, T cells, and granulocytes, as well as macrophages; and in (C) eosinophils, erythroid cells (CD235a⁺), myeloid precursor cells (CD33⁺), and megakaryocytes (CD61⁺).