Table 2.

CFP of fractions of Lin⁻cKit⁺Sca1⁻IL7Rα⁻FcγRII/III^loCD150⁺ adult bone marrow

	Clonogenic colonies per 100 cells plated
Fraction	Blast	G	GM	M	Eo	Meg	% of CD150+ fraction	Meg contribution (%)
CD9loendoglinlo (BEMP)	0.5 ± 0.5	0.2 ± 2	0.2 ± 0.2	0.2 ± 0.2	0 ± 0	28 ± 9	51 ± 4.9	92
CD9hiendoglinlo	0.5 ± 0.6	0.1 ± 0.2	0.2 ± 0.4	0.3 ± 0.3	0 ± 0	10 ± 4	13 ± 2.3	8
CD9loendoglinhi (PreCFU-E)	0 ± 0	0 ± 0	0.2 ± 0.3	0 ± 0	0 ± 0	0.5 ± 0.3	36 ± 5.8	0

Mean colony counts ± SD per 100 cells from four replicate experiments using a combined stimulus of SCF, IL-3, and EPO. Eo, eosinophil; G, granulocyte; GM, granulocyte-macrophage; M, macrophage; Meg, megakaryocyte colonies, including colonies of megakaryocytes and erythroid cells; Meg contribution, percentage contribution to megakaryocyte CFC of each fraction, calculated by adjusting contribution to percentage of CD150⁺ fraction by relative ability of cells to form megakaryocyte colonies; % of CD150⁺ fraction, percentage contribution each population to Lin⁻cKit⁺Sca1⁻IL7Rα⁻FcγRII/III^loCD150⁺ adult bone marrow with means ± SD from six mice.