Anti-UGT1A1 antibodies are used in the immunodetection of the protein UDP glucuronosyltransferase family 1 member A1. In humans, the canonical protein has a reported length of 533 amino acid residues and a mass of 59.6 kDa. Its subcellular localization is in the ER and cytoplasm. Up to 2 different isoforms have been reported for this protein. A member of the UDP-glycosyltransferase protein family, UGT1A1 is reported to be a UDP-glucuronosyltransferase (UGT) that catalyzes phase II biotransformation reactions in which lipophilic substrates are conjugated with glucuronic acid to increase the metabolite's water solubility, thereby facilitating excretion into either the urine or bile. Post-translational modifications have been described, including glycosylation. Synonyms for this target antigen include BILIQTL1 and GNT1. UGT1A1 gene orthologs have been reported in the rat species. A number of UGT1A1 antibodies have been mentioned in research publications and have associated citations. Western Blot is a widely used application for these antibodies. ELISA, Immunofluorescence, and Immunohistochemistry are also common applications.