Structure
Many RBPs have modular structures and are composed of multiple repeats of just a few specific basic domains that often have limited sequences. These sequences are then arranged in varying combinations to fulfill the need for diversity. A specific protein's recognition of a specific RNA has evolved through the rearrangement of these few basic domains. Each basic domain recognizes RNA, but many of these proteins require multiple copies of one of the many common domains to function.
Read more about this topic: RNA-binding Protein
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