Newfound Genetic Code-in-Code Regulates Stress Response

There are 64 combinations in the genetic code (43), because there are four bases arranged in threes. Each triplet codon codes for one amino acid, of which there are 20 normally used in proteins. This mismatch of 64 versus 20 has been called degeneracy, and has long been a mystery. Some amino acids have a single codon, but others can be coded by up to six codons. Is this redundancy just a "frozen accident," as Francis Crick thought? Could there be functional reasons why a gene would specify o...