Table 5.

Repopulating ability of HSC from marrow and TPO-LTBMC

Number of cells transplanted	Donor-derived peripheral blood leukocytes/μl
	Marrow		TPO-LTBMC
	3 weeks*	3 months*	3 weeks*	3 months*
50,000	504	2,480	360	852
100,000	552	4,087	2,673	3,640

Peripheral blood samples from the animals illustrated in Fig. 3B were first analyzed by flow cytometry for the percent of peripheral blood leukocytes expressing the donor-derived CD45.1 allele. This percentage was multiplied by the number of leukotyces per microliter of blood (from microscopic counting with a hemocytometer) to obtain the absolute number of donor-derived cells per microliter. 

^*Time after transplant.