Complementary DNA is often used in gene cloning or as gene probes or in the creation of a cDNA library.

* Complementary DNA tool

th: Complementary DNA

# Complementary DNA then binds to the U5 ( non-coding region ) and R region ( a direct repeat found at both ends of the RNA molecule ) of the viral RNA

* Complementary DNA, DNA reverse transcribed from a mature mRNA template

Complementary DNA ( cDNA ) is much more stable than mRNA and so, once the double-stranded DNA has been produced it represents the expressed DNA sequence scientists look for.