C2 Complement Component
Commercial Mail-out Laboratory
Sample must be processed and frozen within 2 hours of blood draw.
|Red top tube 5 mL (Clot Activator)
Preferred minimum: 1 mL serum
Plasma is not accepted. Non-frozen specimen. Specimens exposed to
repeated freeze/thaw cycles. Specimens left to clot at refrigerated
Deliver to laboratory immediately after collection. Critical frozen.
5-10 days upon receipt at reference laboratory.
Decreased C2 levels may be associated with increased susceptibility to
infection (especially pneumococcal infections), systemic lupus
erythematosus-like disease, rashes, arthritis, nephritis, and with C1-
Esterase deficiency. Increased C2 levels are associated with the acute