In vivo repopulating capacity of ALL subpopulations. ALL cells from 4 patients (1, 6, 8, and 14) were sorted for both CD133/19 and CD34/19 (A), and 6 patients (1, 5, 7, and 9-11) were sorted for expression of CD133 and CD38 (B). The closed symbols in panel A represent inoculation of CD133⁺/CD19⁻ cells; open symbols, CD34⁺/CD19⁻ cells from the same patient. Numbers on the x-axes represent the number of cells inoculated into recipient animals.