Also known as: C2 Complement.

The Complement C2, Serum test assesses patients with hereditary deficiency of this component or acquired decrease in its level which may be seen due to hypercatabolism in hereditary angioneurotic edema, or consumption or loss as in vasculitides, glomerulonephritides, immune complex diseases. C2 deficiency, the most common complement deficiency, is associated with SLE.