Anti-N-alpha-acetyltransferase 20, NatB catalytic subunit antibodies are used for the immunodetection of the protein encoded by the NAA20 gene. In humans, the canonical protein has a reported length of 178 amino acid residues and a mass of 20.4 kDa. Its subcellular localization is in the nucleus and cytoplasm. Alternative splicing is reported to yield 2 different isoforms for this protein. A member of the Acetyltransferase protein family, it is a known catalytic subunit of the NatB complex which catalyzes acetylation of the N-terminal methionine residues of peptides beginning with Met-Asp, Met-Glu, Met-Asn and Met-Gln. The gene encoding this protein is implicated in Intellectual developmental disorder. Other names for this target antigen include NAT3, NAT3P, NAT5, NAT5P, dJ1002M8.1, N-alpha-acetyltransferase 20, N-acetyltransferase 3 homolog, and MRT73. Gene orthologs have been identified in the mouse, rat, bovine, frog, zebrafish, chimpanzee and chicken species.