Deafness, Autosomal Dominant 3a, also known as dfna3a, is related to deafness, autosomal recessive 1a and deafness, autosomal dominant 51. An important gene associated with Deafness, Autosomal Dominant 3a is GJB2 (Gap Junction Protein Beta 2), and among its related pathways/superpathways are Myometrial relaxation and contraction pathways and Gap junction trafficking. Affiliated tissues include brain and bone, and related phenotype is hearing/vestibular/ear.