Purity: > 95% by SDS - PAGE Format: Liquid. In Phosphate Buffered Saline (pH 7.4) containing 10% glycerol.. CD55, also known as Complement decay-accelerating factor, GPI-anchored, is a member of the RCA(regulators of complement activation) family characterized by four to 30 SCRs(short consensus repeats) in their plasma-exposed regions. It is physiologically acting as an inhibitor of the complement system, but is also broadly expressed in malignant tumours. Recombinant mouse CD55, fused to His-tag at C-terminus, was expressed in insect cell and purified by using conventional chromatography techniques.