The process of converting DNA to proteins through an RNA is far from straightforward. Of the several types of RNA involved in the process of protein synthesis, a few may be edited mid-way. In mammals, RNA editing mostly involves converting adenosine (A) to inosine (I) through deamination, which can result in a wide range of effects. For example, A-to-I conversion can regulate gene expression in different ways and significantly alter the final synthesized protein.
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Source: Phys.org