reverse transcriptases
enzymes found in retroviruses that can synthesize complementary single-strands of DNA from an mRNA sequence as template. They are used in genetic engineering to produce specific cDNA molecules from purified preparations of mRNA.
PAC, 1992, 64, 143. 'Glossary for chemists of terms used in biotechnology (IUPAC Recommendations 1992)' on page 165 (