Human Complement Component 4b (C4b) ELISA Kit

The complement cascade protein Complement Component 4b plays a central role in classical pathway activation, opsonizing pathogens and marking them for immune clearance. This quantitative immunoassay from Assay Genie measures circulating levels of human C4b generated through C4 cleavage during complement activation. The kit supports research into complement-mediated inflammatory disorders, autoimmune conditions, and immune complex diseases. Each kit includes pre-coated microplate wells, detection antibodies, buffers, and standard calibrators sufficient for 96 assays in a single-use microplate format. The reactive format is specific to human samples, supporting studies of lupus, rheumatoid arthritis, transplant rejection, and other conditions where dysregulated complement activity is implicated. The absorbance-based readout is intended for research use only, providing laboratory workflows investigating complement-mediated immune responses.