A primary transcript is an RNA molecule that has not yet undergone any modification after its synthesis such as methylation, or the addition of a Poly-A tail. For example, a precursor messenger RNA (pre-mRNA) is a primary transcript that becomes a messenger RNA (mRNA) after processing, and a primary microRNA (pri-miRNA) precursor becomes a microRNA (miRNA) after processing.
Famous quotes containing the word primary:
“One of the effects of a safe and civilised life is an immense oversensitiveness which makes all the primary emotions somewhat disgusting. Generosity is as painful as meanness, gratitude as hateful as ingratitude.”
—George Orwell (1903–1950)