"REX Gene"^^ . "REX_Gene"^^ . "The genes coding for the Regulator X (rex) protein of HTLV-I and II. The Rex phosphoprotein binds to a cis-acting Rex response element in the RNA transcript. It is required for the nuclear export of unspliced viral RNA, and therefore essential for packaging of the RNA in virions.NCI" . . . "REX Gene"^^ . . "C17361"^^ . "Gene or Genome"^^ . "C0079425"^^ . "REX GenePTNCI" .