NCIt definition : Human MED12 wild-type allele is located in the vicinity of Xq13 and is approximately
24 kb in length. This allele, which encodes mediator of RNA polymerase II transcription
subunit 12 protein, is involved in the modulation of RNA polymerase II activity. Mutation
of the gene is associated with both Opitz-Kaveggia syndrome and Lujan-Fryns syndrome.;