These 4F9 ELISA kits are immunodetection tools for measuring the levels of 4F9 in biological samples. 4F9 is an alias of the human CD82 gene, which encodes the protein, CD82 molecule. The protein is reported to associate with CD4 or CD8 and delivers costimulatory signals for the TCR/CD3 pathway. The CD82 protein is 267 amino acid residues in length and 29.6 kilodaltons in mass. However, as many as 2 protein isoforms have been identified. It is localized to the cell membrane of the cell. In terms of tissue specificity, it is reported to have lymphoid specific expression. This protein is known to be glycosylated. Other names for this target antigen include C33. Click on the following ELISA kits for more detailed information, including target reactivity and assay sensitivity.