Anti-PRO222 antibodies enable researchers to detect and measure the PRO222 antigen in biological samples. This target is a reported synonym of the SUSD4 gene, which encodes sushi domain containing 4. This protein is known to function in innate immune responses, among other biological roles. The human version of PRO222 has a canonical amino acid length of 490 residues and a protein mass of 53.8 kilodaltons, although 4 isoforms have been identified. It is reported to be a secreted protein. Indicated applications for PRO222 antibodies listed below include Western Blot.