Anti-CC28 antibodies enable researchers to detect and measure the CC28 antigen in biological samples. This target is a reported synonym of the TMEM131 gene, which encodes transmembrane protein 131. This protein is believed to play a role in the immune response to viral infection. The human version of CC28 has a canonical amino acid length of 1883 residues and a protein mass of 205.1 kilodaltons. It is reported to be localized in the membrane of cells and widely expressed in many tissue types. CC28 is a member of the TMEM131 protein family.