Anti-TPRX antibodies enable researchers to detect and measure the TPRX antigen in biological samples. This target is a reported synonym of the TPRX1 gene, which encodes tetrapeptide repeat homeobox 1. This protein is known to function in the regulation of transcription, among other biological roles. The human version of TPRX has a canonical amino acid length of 411 residues and a protein mass of 40.6 kilodaltons, although 2 isoforms have been identified. It is reported to be localized in the nucleus of cells. TPRX is a member of the Paired homeobox protein family.