单语范例（未经PONS编辑处理）
英语
- Then, the enzymes citrulline and argininosuccinate convert ornithine to arginine.en.wikipedia.org
- Ornithine and citrulline occur in the urea cycle, part of amino acid catabolism (see below).en.wikipedia.org
- The substrates of the reaction catalyzed by ornithine transcarbamylase are ornithine and carbamyl phosphate, while the product is citrulline.en.wikipedia.org
- It can also be generated from ornithine and citrulline in the urea cycle.en.wikipedia.org
- The urea in wines results from the metabolism of arginine or citrulline by yeast or other organisms.en.wikipedia.org
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英语