Phenotype of NOD/SCID-engrafting ALL cells. ALL cells were sorted for expression of CD34 and CD10 (n = 6) (A) or CD34 and CD19 (n = 5) (B) and evaluated in the NOD/SCID assay. Each patient is represented by a specific symbol, and each symbol depicts the engraftment obtained as measured by CD45⁺ cells present in the bone marrow of the NOD/SCID recipients.