CD55 is widely expressed on hematopoietic and on many non-hematopoietic cells; it is weakly present on NK cells. Decay-accelerating Factor (CD55) is one of the three proteins protecting cells from autologous lysis by complement. (The others are: membrane cofactor protein (MCP; CD46) and an inhibitor of the membrane attack complex formation (CD59))
Immunogen
CD55 monoclonal antibody was raised against HPB - ALL human T cell line (Human).
Recongizes an epitope in SCR4 domain of CD55 (Decay accelerating factor, DAF), a 60-70 kDa glycosylphosphatidylinositol (GPI)-anchored single chain glycoprotein.