This image is a derivative work of the following images: File:Tryptophan_biosynthesis.png licensed with PD-user-w 2009-06-07T07:20:45Z File Upload Bot...
ChemDraw based on Yikrazuul's Image:Tryptophanesynth File:Tryptophan_biosynthesis_(zh-cn).svg licensed with PD-user-w 2011-02-14T13:37:14Z Shakiestone...
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