NCIt definition : Complement decay-accelerating factor (381 aa, 41 kDa) is encoded by the human CD55
gene. This protein plays a role in the negative regulation of the complement cascade.;
NCIt note : Complement decay-accelerating factor prevents the assembly of C3-convertase or accelerates
the disassembly of preformed convertase, thus blocking the compelment cascade.; Antigens present on complement decay-accelerating factor are responsible for the Cromer
blood group system.;