Reverse transcriptase

Ever since Watson and Crick worked out the structure of DNA and how it could replicate, it was thought genetic information flowed only one-way from DNA to RNA. Now an enzyme named reverse transcriptase was discovered, demonstrating the flow of genetic information from RNA back to DNA.
 Howard Martin Temin and David Baltimore United States 1970 Reverse transcriptase

Ever since Watson and Crick worked out the structure of DNA and how it could replicate, it was thought genetic information flowed only one-way from DNA to RNA. Now an enzyme named reverse transcriptase was discovered, demonstrating the flow of genetic information from RNA back to DNA.