Anti-MED9 antibodies are used in the immunodetection of the protein mediator complex subunit 9. In humans, the canonical protein has a reported length of 146 amino acid residues and a mass of 16.4 kDa. Its subcellular localization is in the nucleus. A member of the Mediator complex subunit 9 protein family, MED9 is a known component of the Mediator complex, a coactivator involved in the regulated transcription of nearly all RNA polymerase II-dependent genes. Synonyms for this target antigen include mediator of RNA polymerase II transcription subunit 9, mediator of RNA polymerase II transcription, subunit 9 homolog, mediator subunit 25, and MED25. MED9 gene orthologs have been reported in the mouse, rat, bovine, frog, zebrafish, chimpanzee and chicken species. Western Blot is a widely used application for the MED9 antibodies listed below. In addition, ELISA is also a common application.