Anti-STK3 antibodies are used in the immunodetection of the protein serine/threonine kinase 3. In humans, the canonical protein has a reported length of 491 amino acid residues and a mass of 56.3 kDa. Its subcellular localization is in the nucleus and cytoplasm. Up to 2 different isoforms have been reported for this protein. It is notably expressed at high levels in adult kidney, skeletal and placenta tissues and at very low levels in adult heart, lung and brain tissues. A member of the STE Ser/Thr protein kinase protein family, STK3 is known to be involved with the apoptotic pathway and the Wnt signaling pathway. Synonyms for this target antigen include MST2, serine/threonine-protein kinase 3, KB-1458E12.1, MST-2, STE20-like kinase MST2, and KRS1. STK3 gene orthologs have been reported in the mouse, rat, bovine, frog, zebrafish, chimpanzee and chicken species. Over 140 citations in the literature describe the use of STK3 antibodies in research. Western Blot is a widely used application for these antibodies. In addition, Immunohistochemistry is also a common application.