Antigen expression on viable CD34⁺FGFR⁺ cells.

Isotypic control antibodies were used to indicate the specificity of staining of cells stained with (A) CD34-FITC, (F) CD34-PE, and (K) biotinylated antibody plus streptavidin-PE. CD34⁺FGFR⁺ cells express the following antigens: (B) AC133, (C) c-kit, (D) Thy-1, (E) CD31, (G) CD38, (H) Tie, (I) VE-cadherin, (J) P1H12, (L) Tek, and (M) KDR. All graphs except panel M were obtained from the analysis of cells from the same mobilized peripheral blood sample and are representative of at least 4 separate experiments. KDR results (M) are representative of 3 experiments.