Discovery of an Ancient RAG Transposon in Basal Chordate Illuminates the Origins of V(D)J Recombinat

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  V(D)J recombination has been known as intelligent design to generate highly diversified repertoire of antigen receptors in jawed vertebrate adaptive immunity.Co-option of RAG1 and RAG2 for antigen receptor gene assembly by V(D)J recombination was a critical step in the evolution of jawed vertebrate adaptive immunity.
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