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. 2013 May 8;122(1):19–22. doi: 10.1182/blood-2013-03-453142

Figure 2.

Figure 2

Generic structure of a locus encoding the variable region of a TCRβ or IGH chain after V-D-J rearrangement, illustrating the intervals that encode the 4 framework (FR1-FR4) and 3 complementarity-determining (CDR1-CDR3) regions, the portions contributed by the V, D, and J gene segments, and the “N” nucleotides inserted at the V-D and D-J junctions. The maximum length of FR1-FR3, CDR1, and CDR2, and the modal length of CDR3, in base pairs (bp) and amino acids (aa), are indicated by the numbers at the top of the figure. The left-pointing arrows below the block structure indicate the approximate fraction of the locus that would be sequenced with reads of the indicated length (65, 130, or ≥400 bp) initiated by sequencing primers annealing to the 5′ region of the J gene segment, typical of current deep-sequencing protocols. The scale bar at the bottom of the figure indicates the length of the generic locus in base pairs.