Each lot of this antibody is quality control tested by immunofluorescent staining with flow cytometric analysis. For immunofluorescent staining, the suggested use of this reagent is 20 µl per million cells or 20 µl per 100 µl of whole blood. It is recommended that the reagent be titrated for optimal performance for each application.
Application References:
1. Kishimoto, T., et al., Eds. 1997. Leucocyte Typing VI. Garland Publishing, Inc. London. 2. Peyron, P., et al., 2000. J. Immunol. 165:5186
Human peripheral blood lymphocytes stained with JS11 FITC
Description:
CD55 is a 60-70 kD glycosylphosphatidylinositol (GPI)-anchored single chain glycoprotein also known as decay-accelerating factor (DAF). It is expressed on hematopoietic cells including erythrocytes and many non-hematopoietic cells. CD55 accelerates the dissociation of the components of the C3-convertases (namely C2a from C4b in the C4bC2a complex, a C3-convertase of the classical pathway, and factor Bb from the C3bBb complex, a C3-convertase of the alternative pathway) to protect cells from inappropriate damage caused by autologous complement. CD55 has been reported to reduce the efficiency of NK cell lysis and induce signal transduction in T cells. CD55 has also been shown to interact with CD97 and bind to Coxsackie and Echovirus.
Other Names:
DAF (Decay Accelerating Factor)
Structure:
GPI-achored regulator of complement activation (RCA), type I membrane glycoprotein, 60-70 kD
Distribution:
Hematopoietic cells including erythrocytes and many non-hematopoietic cells
Function:
Protects against inappropriate complement activation and cell damage, induces signal transduction, reduces the efficiency of NK cell lysis
Ligand Receptor:
C3b, C4b, CD97, Coxsackie viruses
Antigen References:
1. Schlossman, S., et al., Eds. 1995. Leucocyte Typing V. Oxford University Press. New York. 2. Hamann, J., et al., 1996. J. Exp. Med. 184: 1185. 3. Fujita, T., et al., 1987. J. Exp. Med. 166: 1221
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