Anti-glutamine amidotransferase class 1 domain containing 3 antibodies are used for the immunodetection of the protein encoded by the GATD3 gene. In humans, the canonical protein has a reported length of 268 amino acid residues and a mass of 28.2 kDa. Its subcellular localization is in the mitochondria. Alternative splicing is reported to yield 2 different isoforms for this protein. It is a member of the GATD3 protein family. Other names for this target antigen include ES1, GATD3A, GT335, HES1, KNPH, and C21orf33. Gene orthologs have been identified in the mouse, rat, bovine, frog, chimpanzee and chicken species.