Why do mRNAs Exist in the Form of mRNPs from Their Birth to Their Death ?

-mRNA associates with a changing population of proteins during its nuclear maturation and cytoplasmic life. -Some nuclear-acquired mRNP proteins have roles in the cytoplasm. -A very large number of RNA-binding proteins (RBPs) exist, most of which remain uncharacterized. -Different mRNAs are associated with distinct, but overlapping, sets of regulatory proteins, creating RNA regulons.