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:
“A primary function of art and thought is to liberate the individual from the tyranny of his culture in the environmental sense and to permit him to stand beyond it in an autonomy of perception and judgment.”
—Lionel Trilling (1905–1975)