Anti-SPEP1 antibodies enable researchers to detect and measure the SPEP1 antigen in biological samples. This target is a reported synonym of the C17orf80 gene, which encodes chromosome 17 open reading frame 80. The human version of SPEP1 has a canonical amino acid length of 609 residues and a protein mass of 67.3 kilodaltons, although 3 isoforms have been identified. It is reported to be localized in the membrane of cells.