Anti-EFM4 antibodies are used in antigen-specific immunodetection in biological samples. The target EFM4 is a known alias name of the protein EEF1A lysine methyltransferase 2, encoded by the EEF1AKMT2 gene in humans. This 291-amino acid residue protein is reported to be a protein-lysine methyltransferase that selectively catalyzes the trimethylation of EEF1A at 'Lys-318'. It is localized to the nucleus and cytoplasm of the cell. It is reported to be widely expressed in many tissue types.