Researchers from Columbia and Harvard are attempting to reduce the standard genetic code from 20 to 19 amino acids by engineering a ribosome component that functions without isoleucine. This experimental approach tests hypotheses about early life forms that may have used simpler genetic codes and leverages AI tools for protein redesign. The work explores fundamental questions about the evolution of the genetic code and its minimal requirements.
Background
The genetic code is universal across life, using 20 amino acids encoded by DNA triplets, with origins tracing back to Earth's last common ancestor. Research has long speculated that earlier life forms used fewer amino acids and simpler codes.
- Source
- Ars Technica
- Published
- May 1, 2026 at 03:34 AM
- Score
- 7.0 / 10