👉 Cardionuclease is a type of enzyme found in bacteria and archaea that breaks down DNA molecules. It was first isolated from the bacterium, "Escherichia coli," by the French chemist Pierre Desmarest in 1936. The enzyme is named after the Greek word for heart, cardios, which refers to the heart of a living organism. Cardionuclease catalyzes the cleavage of DNA into two strands. This process results in the formation