Biologists Challenge Anthropic’s Claim That Claude Discovered an Enzyme System

Anthropic calls a DNA pattern spotted by Claude agents a scientific discovery. Now biologists are challenging both the label and the finding’s novelty. The agents flagged repeats beside a known enzyme, and human scientists began testing the lead. But the system’s function is still unknown, while one researcher says his team had already found the pattern.

A search beside a known enzyme

In its September 23 account, Anthropic said scientists prompted Claude to search a large DNA database for interesting reverse transcriptases, enzymes that copy RNA into DNA. Roughly 950 agents worked for 21 hours. They gathered more than 200,000 examples, selected 3,500 candidate systems and narrowed those to 20 for detailed reports.

The clue was not a new DNA sequence. The underlying enzyme had been identified before. A Claude agent noticed a long array of repeats next to its gene and examined the neighboring sequences. Anthropic calls the proposed system array-associated reverse transcriptases, or ART. It describes three parts: the enzyme, a partner gene and the repeat array. Identifying that arrangement gave scientists a target to investigate; it did not explain what the parts do together.

The lab result and its limit

Human scientists performed the laboratory work. Anthropic says initial experiments found that the ART repeat array produces distinct short RNA molecules. That is a result beyond spotting a pattern in a database, but it does not establish the system’s primary function. Anthropic says further experiments are underway.

Anthropic compares the repeats’ layout to CRISPR arrays and points to other systems with similar combinations of features. Those comparisons help explain why its scientists chose to pursue ART. They do not show that ART works like CRISPR or will become a useful tool. For now, the finding is a promising experimental lead rather than an established account of a new biological mechanism.

Two challenges to the discovery claim

Biologist Lucas Harrington’s objection is about what counts as discovery. Finding an unusual cluster of genes and repeats, he argued, is different from working out what the system does. The distinction does not make the agents’ search worthless: sorting a huge pool of candidates into a small set worth testing is useful scientific work. It does put pressure on Anthropic’s description of Claude as the discoverer.

A second challenge concerns priority. Mario Rodríguez Mestre, a biologist at the University of Copenhagen, says his team had already discovered the pattern, according to a New York Times account cited by MIT Technology Review. Because he had used Claude in his work, he also questioned whether Anthropic learned of it through his conversations. Anthropic denies that it did. His claim and the company’s denial leave priority and the route to the finding contested.

A stronger test than the headline

The dispute need not erase the work between the first prompt and the lab bench. Claude produced a short list from a large search, while people chose to test the lead and ran the experiments. The next substantive result will be whether those experiments establish what ART does. That answer would help scientists judge the biological finding on its merits, apart from the question of how much credit belongs to the agents.