Which of the following is a pan-T lymphocyte marker?: (A) CD 2, (B) CD 3, (C) CD 19, (D) CD 25
Answer is B. Antigen Designation Normal cellular distribution Primarily T-cell associated CD 1 Thymocytes and Langerhans cells CD3 Thymocytes, mature T cells CD4 Helper T cells, subset CD5 T cells and a small subset of B cells CD8 Cytotoxic T cells, subset of thymocytes, and some NK cells