C4 COMPLEMENT COMPONENT
1 SST/1.0 mL serum. After 30 minutes of clotting, promptly centrifuge and refrigerate serum.
Room Temp: 72 hours; Refrigerated: 1 week; Frozen: 2 months
3 Days Setup Mon-Sat AM
Quantitation of C4 is used to detect individuals with inborn deficiency of the factor or those with immunological disease in whom hypercatabolism of complement causes reduced levels. These diseases include lupus erythematosus, serum sickness, certain glomerulonephritides, chronic active hepatitis, and others.