Eagle Biosciences CIC C3d ELISA Assay Kit is an immunoenzymatic colorimetric method for quantitative determination of Circulating Immune Complex C3d (CIC C3d) concentration in human serum or plasma. CIC C3d ELISA kit is intended for research use only not to be used in diagnostic procedures. Sample Types: serum, plasma. Range: 16 - 64μgEq/ml. Sensitivity: 0.60 mgEq/mL. Time: 1.5 hours ? The importance of the immunocomplex (CIC) and their relation with several diseases have been object of investigations for many years.The enstablishment of immunocomplex is a normal protecting process of the immune system. The circulating immunocomplex are removed from the circulation by means of various cellular, biochemical and enzymatic processes.