These CD21 ELISA kits are immunodetection tools for measuring the levels of CD21 in biological samples. CD21 is an alias of the human CR2 gene, which encodes the protein, complement C3d receptor 2. Notably, CD21 is known to play a role in B cell differentiation and immune response pathways, among other functions. The CR2 protein is 1033 amino acid residues in length and 112.9 kilodaltons in mass. However, as many as 4 protein isoforms have been identified. It is localized to the cell membrane of the cell. This protein is known to be glycosylated. Other names for this target antigen include C3DR and CR.
The detection range for different CD21 ELISA kits can vary, with some assays measuring target concentrations as low as 7.81 pg/mL and as high as 100 ng/mL. Click on the following ELISA kits for more detailed information, including target reactivity and assay sensitivity.