Anti-RTL9 antibodies are used in the immunodetection of the protein retrotransposon Gag like 9. In humans, the canonical protein has a reported length of 1388 amino acid residues and a mass of 144.3 kDa. It is notably expressed in the testis. Synonyms for this target antigen include Sushi-Ichi retrotransposon homolog 10, mammalian retrotransposon-derived 9, retrotransposon gag domain containing 1, and retrotransposon Gag-like protein 9. RTL9 gene orthologs have been reported in the mouse, rat, bovine, frog and chimpanzee species. Western Blot is the most common application for the RTL9 antibodies listed below. ELISA, Immunocytochemistry, and Immunofluorescence are also common applications.