Poly(A) tail

The Poly(A) tail is a string of adenine bases (the "A" molecules) attached to the end of messenger RNA (mRNA) molecules in cells. It acts like a protective cap, helping to stabilize the mRNA and prevent it from degradation. The tail also assists in the export of mRNA from the nucleus to the cytoplasm and promotes efficient translation into proteins. Think of it as a protective and functional “tail” that ensures the mRNA can effectively deliver its genetic message. The length of the Poly(A) tail can influence how long the mRNA remains active in the cell.