Anti-EFM3 antibodies enable researchers to detect and measure the EFM3 antigen in biological samples. This target is a reported synonym of the EEF2KMT gene, which encodes eukaryotic elongation factor 2 lysine methyltransferase. This protein is known to catalyze the trimethylation of eukaryotic elongation factor 2 (EEF2) on 'Lys-525'. The human version of EFM3 has a canonical amino acid length of 330 residues and a protein mass of 36.9 kilodaltons, although 2 isoforms have been identified. It is reported to be localized in the cytoplasm of cells and notably expressed in many tissues, such as the breast, testis, and appendix. EFM3 is a member of the EEF2KMT protein family.