Anti-METTL9 antibodies are used in the immunodetection of the protein methyltransferase 9, His-X-His N1(pi)-histidine. In humans, the canonical protein has a reported length of 318 amino acid residues and a mass of 36.5 kDa. Its subcellular localization is in the mitochondria and ER. Up to 2 different isoforms have been reported for this protein. A member of the METTL9 protein family, METTL9 is reported to be a protein-histidine n-methyltransferase that specifically catalyzes 1-methylhistidine (pros-methylhistidine) methylation of target proteins. Post-translational modifications have been described, including glycosylation. Synonyms for this target antigen include DREV, DREV1, PAP1, hMETTL9, protein-L-histidine N-pros-methyltransferase, and CGI-81. METTL9 gene orthologs have been reported in the mouse, rat, bovine, frog, zebrafish, chimpanzee and chicken species. These METTL9 antibodies are widely used in Immunohistochemistry experiments, among other applications.