Anti-RTL4 antibodies are used in the immunodetection of the protein retrotransposon Gag like 4. In humans, the canonical protein has a reported length of 310 amino acid residues and a mass of 34.7 kDa. RTL4 is known to be involved in cognitive function in the brain, possibly via the noradrenergic system. Synonyms for this target antigen include Sushi-Ichi retrotransposon homolog 11, mammalian retrotransposon-derived 4, mammalian retrotransposon-derived protein 4, and retrotransposon Gag-like protein 4. RTL4 gene orthologs have been reported in the mouse, rat and chimpanzee species. Immunocytochemistry is the most common application for the RTL4 antibodies listed below. Immunofluorescence and Immunohistochemistry are also common applications.