Anthropic says Claude found a previously undescribed enzyme system in bacteriophage DNA. One research brief, a database of 1.9 billion protein clusters, roughly 950 agent sessions running 21 hours & consuming about 210 million tokens. The system is called ART: array-associated reverse transcriptase & has three parts: the enzyme, a partner gene of unknown function, & an array of 3 to 21 evenly spaced DNA repeats. The repeat layout is what drew the CRISPR comparison. In CRISPR, an array like that stores RNA guides, which is what makes the system programmable. Now the caveats, which matter more than the headline. The enzyme itself wasn't actually new, earlier studies had identified it. What's new is the recognition of the array & the partner protein alongside it. Nobody knows what ART does. Lab work confirmed the array is expressed as several short RNAs & that's where the biology currently stops. No demonstrated function, no gene-editing capability, preprint not peer-reviewed. Feng Zhang, one of CRISPR's pioneers, reviewed it & called the finding intriguing & worth further investigation, which is a careful scientist's phrasing, not an endorsement. Other researchers have been less impressed. 🤷‍♂️

CLAUDE AUTONOMOUSLY DISCOVERED A NEW BIOLOGICAL SYSTEM Anthropic says Claude identified a previously uncharacterized enzyme system in bacteriophage DNA with CRISPR-like repeat arrays, which it calls ART. Around 950 Claude agents spent 21 hours and 210M tokens analyzing 200,000+ reverse transcriptases, finding 3,500 candidate systems and narrowing them to 20 before flagging ART for human review. Anthropic scientists then validated the system in its new molecular biology lab. Its function is still unknown, but Anthropic says the few known systems with similar features are programmable and can perform operations like cutting, copying and pasting DNA. The company says this is the first result from its new life sciences lab, where Claude generates biological hypotheses and human scientists test the most promising ones experimentally.