Anti-mab-21 like 1 antibodies are used in the immunodetection of the protein encoded by the MAB21L1 gene. In humans, the canonical protein has a reported length of 359 amino acid residues and a mass of 41 kDa. Its subcellular localization is in the nucleus. It is reported to be expressed in the brain, cerebellum and skeletal muscle. A member of the Mab-21 protein family, it is known to be a putative nucleotidyltransferase required for several aspects of embryonic development including normal development of the eye. Other names for this target antigen include COFG, Nbla00126, putative nucleotidyltransferase MAB21L1, mab-21-like protein 1, and CAGR1.