Anti-Synovial Sarcoma, X breakpoint 5 antibodies enable researchers to detect and measure the Synovial Sarcoma, X breakpoint 5 antigen in biological samples. This target is a reported synonym of the SSX5 gene, which encodes SSX family member 5. This protein is known to function in the regulation of transcription, among other biological roles. The human version of Synovial Sarcoma, X breakpoint 5 has a canonical amino acid length of 188 residues and a protein mass of 21.7 kilodaltons, although 2 isoforms have been identified. It is reported to be notably expressed in the testis. Other names for this target antigen include protein SSX5 and synovial sarcoma, X breakpoint 5.