Analysis of surface expression on FDC-P1 cells expressing either IL-3Rα + hβc or IL-3RΔNT + hβc or IL-3RΔCT + hβc by flow cytometry using isotype control MoAb (C), MoAb 1C1 for hβc detection (β), and MoAb 7G3 for IL-3Rα detection (α). IL-3Rα and IL-3RαΔCT are expressed at similar levels, but IL-3RαΔNT is not recognized by the MoAb 7G3.