FACS histograms from recipients of CD18

null and selectin null donor cells. (A,B) FACS histogram of single-cell suspensions prepared from colony-derived cells (granulocyte-macrophage, erythroid burst-forming units, CFU-Mix) after culturing BM of recipients of CD18^−/− cells (A) 2 weeks after transplantation. Note that in contrast to colonies derived from double-positive cells (B), all colonies from the CD18^−/− double-positive recipients were contributed by CD18^−/− cells. (C,D) Peripheral blood white blood cells at 30 days after transplantation in double-positive recipients of EPL^−/− BM cells (C) and EPL^−/− recipients of double-positive BM cells (D).