What is the primary function of the blood component that expresses CD55, a marker involved in the regulation of complement activation?

A To facilitate the activation of the coagulation cascade
B To inhibit the activation of the complement system ✓
C To promote the adhesion of leukocytes to endothelial cells
D To regulate the expression of cytokines and chemokines

Explanation

CD55, also known as decay-accelerating factor, is a protein that inhibits the activation of the complement system by preventing the assembly of the C3 convertase enzyme complex.

Source

Immunology textbooks and research articles
Hematology Hematology: Blood Components Hematology: Blood Components Medium MEDICAL Confidence: high