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. 2020 May 19;8:357. doi: 10.3389/fcell.2020.00357

FIGURE 1.

FIGURE 1

Chromosome 14 ideogram showing genomic location of the IGH gene region (red box). The right side diagram schematically illustrates the germline configuration of V, D, and J IGH genes (top) and the rearranged IGH gene in a given B-cell. Remarkable IGH repertoire diversity is generated by the rearrangement potential of many V, D, and J genes, as well as the effects of junctional nucleotide alterations (trimming and additions of random nucleotide pool bases by the enzyme terminal deoxynucleotidyl transferase, TdT) (A). IGH Rearrangement and Junctional Sequences. Leader primers typically provide a longer sequence as compared to the framework primers. Evaluation of junctional sequences including the Cys104 and Trp118 anchors is essential for SHM determination (B).