"Ornithine Biosynthesis". School of Biological and Chemical Sciences, Queen Mary, University of London. Arquivado dende o orixinal o 14-04-2012. Consultado o 20-05-2012..
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"Ornithine Biosynthesis". School of Biological and Chemical Sciences, Queen Mary, University of London. Arquivado dende o orixinal o 14-04-2012. Consultado o 20-05-2012..