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Test Code C2AG C2 Complement, Antigen, Serum

Performing Laboratory

Mayo Medical Laboratories in Rochester

Reporting Name

C2 Complement, Antigen, S

Specimen Type

Serum Red


Specimen Required


Only orderable as a reflex. For more information see C2 / C2 Complement, Functional, with Reflex, Serum.


Specimen Stability Information

Specimen Type Temperature Time
Serum Red Frozen (preferred) 60 days
  Ambient  7 days
  Refrigerated  7 days

Specimen Minimum Volume

0.5 mL

Day(s) and Time(s) Performed

Wednesday, Friday; 1 p.m.

Specimen Retention Time

14 days

Analytic Time

1 day

Reference Values

1.1-3.0 mg/dL

Only orderable as a reflex. For more information see C2 / C2 Complement, Functional, with Reflex, Serum.

Method Name

Only orderable as a reflex. For more information see C2 / C2 Complement, Functional, with Reflex, Serum.

Radial Immunodiffusion-Binding Site

Test Classification

This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the U.S. Food and Drug Administration.

CPT Code Information

86160

LOINC Code Information

Test ID Test Order Name Order LOINC Value
C2AG C2 Complement, Antigen, S 4484-2

 

Result ID Test Result Name Result LOINC Value
84141 C2 Complement, Antigen, S 4484-2

Method Description

C2 antigen is measured by radial immunodiffusion (RID). Antiserum to C2 is embedded in a layer of agarose, wells are punched into the agarose gel, and the patient specimens and standards are allowed to diffuse into the gel and form a precipitin ring. The diameter of the ring is proportional to the antigen (C2) concentration. The RID reagent set is from The Binding Site Ltd.(Mancini G, Carbonara AO, Heremans JF: Immunochemical quantitation of antigens by single radial immunodiffusion. Immunochemistry, 1965;2:235)