Anti-METTL18 antibodies are used in the immunodetection of the protein methyltransferase 18, RPL3 N3(tau)-histidine. In humans, the canonical protein has a reported length of 372 amino acid residues and a mass of 42.1 kDa. Its subcellular localization is in the nucleus and cytoplasm. It is notably widely expressed in many tissue types. A member of the METTL18 protein family, METTL18 is reported to be a Protein-L-histidine N-tele-methyltransferase that specifically monomethylates RPL3, thereby regulating translation elongation. Post-translational modifications have been described, including methylation. Synonyms for this target antigen include arsenic-transactivated protein 2, methyltransferase like 18, methyltransferase-like protein 18, and histidine protein methyltransferase 1 homolog. METTL18 gene orthologs have been reported in the mouse, rat, bovine, frog, zebrafish, chimpanzee and chicken species. Some METTL18 antibodies may have been used in research and have associated citations. Immunofluorescence is a widely used application for these antibodies. Immunocytochemistry and Immunohistochemistry are also common applications.