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Human serum chemically depleted of C4 protein.

Quidel's C4 Depleted sera is treated to remove C4 functional activity. With the exception of the depleted protein, the alternative and classical pathways are fully active. These reagents are therefore ideal for the detection and quantitation of hemolytically active complement components.

Depleted sera have been used to assess complement activation in non-human species.

 For Research Use Only. Not for use in diagnostic procedures.