Anti-ABTAP antibodies enable researchers to detect and measure the ABTAP antigen in biological samples. This target is a reported synonym of the ESF1 gene, which encodes ESF1 nucleolar pre-rRNA processing protein homolog. This protein is known to function in rRNA processing, among other biological roles. The human version of ABTAP has a canonical amino acid length of 851 residues and a protein mass of 98.8 kilodaltons. It is reported to be localized in the nucleus of cells and widely expressed in many tissue types. ABTAP is a member of the ESF1 protein family.