Junctional sequences of fetal T cell receptor beta chains have few N regions.

Abstract excerpt

T cell receptors (TCRs) and immunoglobulins (Igs) derive a large fraction of their repertoire from diversity generated at the junctions of the V, D, and J coding segments. This diversity is derived both from the random deletion of nucleotides from the ends of coding regions and from the subsequent addition of nontemplated N region nucleotides. While the vast majority of TCRs and Igs from adult mice have N...

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