Anti-SARP antibodies enable researchers to detect and measure the SARP antigen in biological samples. This target is a reported synonym of the ANKRD42 gene, which encodes ankyrin repeat domain 42. This protein is known to function in NF-kappaB signaling pathways, among other biological roles. The human version of SARP has a canonical amino acid length of 389 residues and a protein mass of 43.1 kilodaltons, although 2 isoforms have been identified. It is reported to be notably expressed in many tissues, such as the bronchus and epididymis.