A collaborative research team from Columbia University and Harvard University is exploring the potential to reduce the genetic code from 20 to 19 amino acids by eliminating isoleucine. This investigation stems from the hypothesis that earlier life forms may have utilized simpler genetic codes with fewer amino acids. By engineering a part of the ribosome to function without isoleucine, the researchers aim to gain insights into the evolution of genetic codes and the chemistry that could arise from such reductions. Isoleucine, along with leucine and valine, is one of three similar amino acids known for their hydrophobic properties. The researchers believe that advancements in AI-based tools now make it feasible to redesign proteins to use fewer amino acids, paving the way for new biochemical discoveries.