尿刊酸
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尿刊酸 （英语：Urocanic acid）是L-组氨酸分解代谢的中间体。
尿刊酸是由L-组氨酸通过组氨酸解氨酶(或称为组氨酸氨裂解酶或组氨酸酶)脱氨而来。
在肝脏中，尿刊酸由尿刊酸水合酶转化为咪唑-4-酮-5-丙酸，并最终转化为谷氨酸。
Urocanic acid
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Urocanic acid 尿刊酸
Urocanic acid is an intermediate in the catabolism of L-histidine.
It is formed from L-histidine through the action of histidine ammonialyase (also known as histidase or histidinase) by elimination of ammonium.
In the liver, urocanic acid is transformed by urocanate hydratase (or urocanase) to 4-imidazolone-5-propionic acid and subsequently to glutamic acid.
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