tryp·to·phan [ˈtrɪptəfæn] 名词 (Aminosäure)
- tryptophan
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tryptophan synthesis [ˌtrɪptəfænˈsɪnθəsɪs] 名词
- tryptophan synthesis
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单语范例（未经PONS编辑处理）
The tryptophan repressor blocks the transcription and expression of the genes, thereby creating negative feedback regulation of the tryptophan synthesis process.
en.wikipedia.org So high levels of tryptophan prevent tryptophan synthesis through a negative feedback loop and, when the cell's tryptophan levels are reduced, transcription from the trp operon resumes.
en.wikipedia.org The operon is regulated so that when tryptophan is present in the environment, the genes for tryptophan synthesis are not expressed.
en.wikipedia.org However, when tryptophan is already available to the cell, these genes for tryptophan synthesis are no longer needed.
en.wikipedia.org In bacteria that synthesize tryptophan, high cellular levels of this amino acid activate a repressor protein, which binds to the trp operon.
en.wikipedia.org 互联网提供的例句（未经PONS编辑处理）
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www.uni-muenchen.de “This enzyme can do so by breaking down the amino acid tryptophan, which is essential for T-cells.
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„Das gelingt dem Enzym durch den Abbau der Aminosäure Tryptophan, die für T-Zellen essentiell ist.
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