Claude Agents Discover a New Enzyme System in Viruses

Anthropic has started a new biology lab, and the first thing its Claude agents did was search DNA databases. In 21 hours, 950 agents screened more than 200,000 reverse transcriptase enzymes. They narrowed the field down to 3,500 candidates for an unknown system. Scientists then checked the 20 most promising candidates by hand in the lab. That is how they found the ART enzyme in bacteriophages, viruses that infect bacteria. It is built from a row of identical DNA repeats, structurally similar to CRISPR, and it produces short RNA sequences. That likely means it can be programmed too.

What matters to me here is that the discovery was not left as text on a page. It was confirmed by hand in the lab. The agents found a candidate, not a finished answer. The system produced 3,500 possible candidates, and only twenty of them made it to the scientists' bench. That means the agents really did handle the bulk of the filtering. It is an honest example of the split: AI searches for needles in a haystack, and it does not replace the researcher who checks the find.