Azevedo RA, Lea PJ, Damerval C, Landry J, Bellato CM, Meinhardt LW, Le Guilloux M, Delhaye S, Varisi VA, Gaziola SA, Gratão PL, Toro AA. Regulation of Lysine Metabolism and Endosperm Protein Synthesis by the Opaque-5 and Opaque-7 Maize Mutations. J. Agric. Food Chem. 2004 Jul 01;52(15):4865–71. doi: 10.1021/jf035422h.