Fig. 1

![Fig. 1: Biosynthetic pathway diagram for L-5-hydroxytryptophan production from glucose in engineered Escherichia coli. Key enzymatic steps including tryptophan hydroxylase and cofactor regeneration pathways are highlighted as targets for metabolic engineering.](https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9509612/bin/12934_2022_1920_Fig1_HTML.jpg)

> Source: Zhen Zhang et al. "Metabolic engineering of Escherichia coli for efficient production of L-5-hydrox." *Microbial cell factories*, 2022. PMID: [36153615](https://pubmed.ncbi.nlm.nih.gov/36153615/)

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  <img src="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9509612/bin/12934_2022_1920_Fig1_HTML.jpg" alt="Biosynthetic pathway diagram for L-5-hydroxytryptophan production from glucose in engineered Escherichia coli. Key enzymatic steps including tryptophan hydroxylase and cofactor regeneration pathways are highlighted as targets for metabolic engineering." />
  <figcaption>Fig. 1. Biosynthetic pathway diagram for L-5-hydroxytryptophan production from glucose in engineered Escherichia coli. Key enzymatic steps including tryptophan hydroxylase and cofactor regeneration pathways are highlighted as targets for metabolic engineering.<br>  Source: Zhen Zhang et al. "Metabolic engineering of Escherichia coli for efficient production of L-5-hydrox." <em>Microbial cell factories</em>, 2022. PMID: <a href="https://pubmed.ncbi.nlm.nih.gov/36153615/">36153615</a></figcaption>
</figure>