Fig. 2

![Fig. 2: Comparison of 5-HTP titers from different E. coli strain variants engineered with various combinations of pathway modifications. Iterative optimization of the biosynthetic route yielded progressively higher 5-HTP accumulation from glucose.](https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9509612/bin/12934_2022_1920_Fig2_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/)

<figure>
  <img src="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9509612/bin/12934_2022_1920_Fig2_HTML.jpg" alt="Comparison of 5-HTP titers from different E. coli strain variants engineered with various combinations of pathway modifications. Iterative optimization of the biosynthetic route yielded progressively higher 5-HTP accumulation from glucose." />
  <figcaption>Fig. 2. Comparison of 5-HTP titers from different E. coli strain variants engineered with various combinations of pathway modifications. Iterative optimization of the biosynthetic route yielded progressively higher 5-HTP accumulation from glucose.<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>