Overview
- Anthropic published a preprint Wednesday describing ART, short for array-associated reverse transcriptases, a three-part system found mainly in bacteriophages.
- ART combines a reverse transcriptase, an adjacent unknown accessory gene, and a long array of evenly spaced DNA repeats that Anthropic says resemble CRISPR arrays.
- Human scientists in Anthropic’s Bay Area wet lab ran BSL‑1/2 experiments that show the repeat array is transcribed into distinct short RNAs, but those tests do not demonstrate the system’s biological role.
- Anthropic says roughly 950 Claude agents ran for about 21 hours using ~210 million tokens to scan over 200,000 reverse transcriptases and narrow candidates to a short list that led to the reported finding.
- Independent scientists called the result intriguing, a separate Stanford group reported related signals, and researchers caution that replication, mechanistic proof, safety checks, and peer review are needed before any claim of gene‑editing utility can be made.