Intracellular gene transfer in action: Dual transcription and multiple silencings of nuclear and mitochondrial cox2 genes in legumes. - Adams,K..L..; Song,K..; Roessler,P..G..; Nugent,J..M..; Doyle,J..L..; Doyle,J..J..; Palmer,J..D.. (Proc. Natl. Acad. Sci. USA, 1999)