Transcription and RNA Processing

ID #1169

Among the functions of the Poly(A) tail, I don't understand how it aids in allowing multiple proteins to be efficiently made from a single eukarytotic mRNA.


There are proteins that bind to a poly-A tail. These proteins will in turn bind to the assembly of proteins that gathers at the 5' end of that same mRNA molecule, forming a circle. So when a ribosome finishes a copy of that protein and the subunits dissociate, they're right back at the beginning to start another copy of that same protein.

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