Induction of EGFP expression in SCL-tTA-2S/EGFP-lacZ double-transgenic mice is restricted to granulocytes, red blood cells, megakaryocytes, and c-kit⁺/lin^- cells of the bone marrow. The presence of EGFP⁺ cells in DX5⁺ NK cells, Gr1⁺ myeloid cells, TER119⁺ red blood cells, CD3⁺ T-lymphoid cells, CD19⁺ cells, CD41⁺ megakaryocytes, CD23 mature B cells, activated macrophages, eosinophils, follicular dendritic cells, and the bone marrow lin^-/c-kit⁺ population was determined by FACS.