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

Purified human complement Factor D. Factor D is unique to the Alternative Complement Pathway. It consists of a single peptide chain with a molecular weight of 24 kD. Factor D is a specific serine protease which cleaves Factor B complexed with C3b (or hydrolyzed C3) in a single position to yield Bb and Ba.

All Quidel complement components are tested for functional activity in a standard lytic or applicable functional ***** 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, please contact Quidel Technical Support.