Mediator complex subunit 9 (Med9) is a protein that in humans is encoded by the MED9 gene.
The multiprotein Mediator complex is a coactivator required for activation of RNA polymerase II transcription by DNA bound transcription factors. The protein encoded by this gene is thought to be a subunit of the Mediator complex. This gene is located within the SmithâÂÂMagenis syndrome region on chromosome 17. [provided by RefSeq, Jul 2008].