Development of stem/progenitor cells, lymphocytes, and myeloid cells is normal in the absence of Med1. FACS analysis reveals equal numbers of stem/progenitor cells (A), monocytes and granylocytes (B), B lymphocytes in the bone marrow (C) and spleen (D), and T lymphocytes in the thymus (E and F) in Med1 conditional knockout (Med1 fl/fl: floxed Med1 alleles; ROSA-RFP: Cre reporter; Mx-Cre: inducible Cre-transgene) and wild-type mice (littermates but not floxed).