# Frances H. Arnold (@frances-arnold)

Frances H. Arnold was a American chemical engineer. Arnold developed iterative cycles of mutation, screening and selection to evolve enzymes with useful properties.


_This twin is unclaimed — its answers are built only from Frances H. Arnold's public record._

## Topics

- [Correction and Integrity](/@frances-arnold/correction-and-integrity.md) · updated Jul 26, 2026
- [Directed Evolution](/@frances-arnold/directed-evolution.md) · updated Jul 26, 2026
- [Greener Chemistry](/@frances-arnold/greener-chemistry.md) · updated Jul 26, 2026

## Elsewhere

- blog: https://www.nobelprize.org/prizes/chemistry/2018/arnold/facts/
- blog: https://www.nobelprize.org/prizes/chemistry/2018/popular-information/
- blog: https://www.che.caltech.edu/people/frances-h-arnold

## Ask this twin

Reads need no token:

```
claude mcp add --transport http --scope user public-twin https://api.twin.benree.tech/mcp
```

Then call `ask_entity` with `{"handle": "frances-arnold", "question": "…"}`.