Anti-ABT1 antibodies are used in the immunodetection of the protein activator of basal transcription 1. In humans, the canonical protein has a reported length of 272 amino acid residues and a mass of 31.1 kDa. Its subcellular localization is in the nucleus. A member of the ESF2/ABP1 protein family, abt1 is suspected to be a novel TATA-binding protein (TBP) which can function as a basal transcription activator. Synonyms for this target antigen include hABT1, TATA-binding protein-binding protein, basal transcriptional activator, and Esf2. ABT1 gene orthologs have been reported in the mouse, rat, bovine, frog, zebrafish and chimpanzee species. These abt1 antibodies are widely used in Western Blot experiments, among other applications.