Anti-ALKAL1 antibodies are used in the immunodetection of the protein ALK and LTK ligand 1. In humans, the canonical protein has a reported length of 129 amino acid residues and a mass of 14.3 kDa. Its subcellular localization is in the cell membrane and is secreted. Up to 2 different isoforms have been reported for this protein. It is reported to be widely expressed with highest levels in thyroid and moderate levels in stomach, trachea, small intestine, prostate and brain. A member of the ALKAL protein family, ALKAL1 is a reported cytokine that acts as a physiological ligand for receptor tyrosine kinase LTK, leading to its activation. Synonyms for this target antigen include RPLK9433, augmentor beta, augmentor-alpha, family with sequence similarity 150 member A, protein FAM150A, and AUG-beta. ALKAL1 gene orthologs have been reported in the mouse, rat, bovine, frog, chimpanzee and chicken species. Some ALKAL1 antibodies may have been used in research and have associated citations. Immunohistochemistry is a widely used application for these antibodies. ELISA and Western Blot are also common applications.