Comparison of the expression of HLA and costimulatory molecules on AML blasts and AML-DCs from patient # 9. Shown is the phenotype of leukemic blasts from AML patient # 9 in the monocyte gate before culture on day 0 (panel a) and of DCs generated from blasts of the same AML patient after 8 days of culture (panel b). A monoclonal antibody against CD34 was used to dissect the subpopulations of leukocytes from normal hematopoiesis versus leukemic blasts.