Anti-C4S-2 antibodies enable researchers to detect and measure the C4S-2 antigen in biological samples. This target is a reported synonym of the CHST12 gene, which encodes carbohydrate sulfotransferase 12. This protein is known to catalyze the transfer of sulfate to position 4 of the N-acetylgalactosamine (GalNAc) residue of chondroitin and desulfated dermatan sulfate. The human version of C4S-2 has a canonical amino acid length of 414 residues and a protein mass of 48.4 kilodaltons. It is reported to be localized in the Golgi of cells and widely expressed in many tissue types. C4S-2 is a member of the Sulfotransferase 2 protein family.