Anti-PPP1R42 antibodies are used in the immunodetection of the protein protein phosphatase 1 regulatory subunit 42. In humans, the canonical protein has a reported length of 309 amino acid residues and a mass of 35.5 kDa. Its subcellular localization is in the cytoplasm. Up to 2 different isoforms have been reported for this protein. PPP1R42 is reported to regulate phosphatase activity of protein phosphatase 1 (PP1) complexes in the testis. Post-translational modifications have been described, including phosphorylation. Synonyms for this target antigen include leucine-rich repeat-containing protein 67, testis leucine-rich repeat, and leucine rich repeat containing 67. PPP1R42 gene orthologs have been reported in the mouse, rat, bovine, frog, zebrafish, chimpanzee and chicken species. Some PPP1R42 antibodies may have been used in research and have associated citations. Immunofluorescence is a widely used application for these antibodies. Western Blot, Immunocytochemistry, and Immunohistochemistry are also common applications.