Reacts with CD55, decay-accelerating factor (DAF), a glycosylphosphatidylinositol (GPI)-anchored single chain glycoprotein of approximately 70 kDa, expressed on hematopoietic cells. It has been suggested that the role of DAF is to protect cells from damage by autologous complement preventing the amplification steps of the complement cascade by interfering with the assembly of the C3-convertases, C4b2a and C3bBb, and the C5-convertases, C4b2a3b and C3bBb3b. This antibody is routinely tested by flow cytometric analysis. Other applications were tested during antibody development only or reported in the literature. Profile of K562 cells expressing glycosylphosphatidylinositol (GPI) anchor protein analyzed by flow cytometry Profile of glycosylphosphatidylinositol (GPI) anchor-defective mutant cell line analyzed by flow cytometry