# The Rundown AI — Google tests AI watermarks for proteins with SynthID Bio

- Company: The Rundown AI (therundown.ai)
- Announced: 2026-10-02T13:44:26.775000+00:00
- Category: research-paper
- Coverage: not counted
- Announcement: yes
- Group: announcements
- Source: https://www.therundown.ai/news/google-deepmind-synthid-bio-protein-watermarks
- Record: https://forck.live/items/15743-google-tests-ai-watermarks-for-proteins-with-synthid-bio
- Subject: Reporting
- Models affected: ProteinMPNN, AlphaFold 3

Google DeepMind introduced SynthID Bio, a proof of concept that extends AI watermarking to proteins. The system uses two methods: one watermarks amino acid sequences via ProteinMPNN, and the other embeds hidden patterns in 3D coordinates via AlphaFold 3. The structure detector achieved over 99.8% detection at a 0.1% false positive rate, and lab tests showed comparable binding strength for marked and unmarked proteins. However, the marks can be removed, and performance across other designs remains uncertain.

## Evidence

Verbatim from https://www.therundown.ai/news/google-deepmind-synthid-bio-protein-watermarks:

> Google’s researchers report in Nature that the structure detector found more than 99.8% of watermarked predictions at a 0.1% false positive rate on the AlphaFold 3 evaluation set. The team says its recommended setup preserved the structural accuracy measures it tested.

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Record: https://forck.live/items/15743-google-tests-ai-watermarks-for-proteins-with-synthid-bio
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