In dictionaries:
Untranslated region
In molecular genetics, an untranslated region (or UTR) refers to either of two sections, one on each side of a coding sequence on a strand of mRNA.
Five prime untranslated region
The 5′ untranslated region (also known as 5′ UTR, leader sequence, transcript leader, or leader RNA) is the region of a messenger RNA (mRNA) that is directly upstream from the initiation codon.
Three prime untranslated region
In molecular genetics, the three prime untranslated region is the section of messenger RNA (mRNA) that immediately follows the translation termination codon.
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