File:Urea Cycle.svg - Wikimedia Commons
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Category:GO:0042978 ! ornithine decarboxylase activator activity - GONUTS
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The Urea Cycle
Ornithine - Wikipedia
Ornithine aminotransferase - Wikipedia
Ornithine cyclodeaminase - Wikipedia
Ornithine transcarbamylase - Wikipedia
ornithine - Wiktionary, the free dictionary
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File:Ornitin.svg - Wikimedia Commons
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File:D-ornithine aminomutase.svg - Wikimedia Commons
