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1. The process of formation of poly(adenylic acid).
2. The covalent modification of a macromolecule (for example, mRNA) by the formation of a polyadenylyl moiety covalently linked to the macromolecule.
Farlex Partner Medical Dictionary © Farlex 2012
polyadenylationThe process by which a sequence of polyadenylic acids (adenosine ribonucleotides) is added to the end of a spliced RNA after its transcription from DNA, resulting in mature mRNA. This addition on the RNA molecule is sometimes referred to as a poly-A tail, and commonly contains several-hundred bases.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.
polyadenylationaddition of a sequence of ADENINE NUCLEOTIDES to the 3′-end of most eukaryotic RNA molecules, after their TRANSCRIPTION. The sequence is often called a.poly(A) tail.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005