There are far more than four letters in the genetic alphabet. Starting with experiments at a nuclear research facility in the 1940s, we now know of more than 150 modified nucleotides, hugely extending the biological information inside cells.
All tagged nuclear weapons
There are far more than four letters in the genetic alphabet. Starting with experiments at a nuclear research facility in the 1940s, we now know of more than 150 modified nucleotides, hugely extending the biological information inside cells.