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 10 mM Imidazole, 140 mM NaCl, 8 mM EDTA, pH 7.4

 At or below –70°C

Complement protein C1r is a serine protease that combines with C1q and C1s to form C1, the first component of the classical pathway of the complement system. During complement activation, C1r and C1s act to cleave complement proteins C2 and C4.

All Quidel complement components are tested for functional activity in a standard lytic or applicable functional assay and for biochemical purity by SDS-polyacrylamide gel electrophoresis. Please refer to the Certificate of Analysis for lot specific information on functional titer.

Quidel's purified human complement components are useful in a wide variety of immunochemical and research applications. For assistance with a specific protocol

 Quidel C1r Protein

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