Anti-G20 antibodies enable researchers to detect and measure the G20 antigen in biological samples. This target is a reported synonym of the C3orf18 gene, which encodes chromosome 3 open reading frame 18. The human version of G20 has a canonical amino acid length of 162 residues and a protein mass of 17.5 kilodaltons, although 2 isoforms have been identified. It is reported to be localized in the membrane of cells and widely expressed in many tissue types.