Quantification of complement C5b-9 binding to cells by flow cytometry.
2014
: Interaction of the complement system, directly or indirectly (e.g., via antibodies), with cells activates the early and late complement components and culminates in the deposition of a membrane-spanning C5b-9 complex on the cell surface. At a high copy number, this C5b-9 will activate cell death, whereas at a low copy number, it will transmit various signals into cells. Quantification of C5b-9 deposition is useful for assessments of the capacity of cells and antibodies to activate complement. By using an antibody that identifies a novel antigen of the C5b-9 complex, the amount of C5b-9 complexes on cells can be quantified by flow cytometry. The detailed protocol is described in this chapter.
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