Fig. (2).

Genomic organization of immunoglobulin light chain loci in representative tetrapod species. Constant, joining and variable genes are represented by gray, dotted black, and solid black vertical lines, respectively. Long vertical lines indicate functional genes whereas short vertical lines indicate pseudogenes. Vertical lines above and below the horizontal lines indicate that the Ig genes are located on opposite strands. In the frog κ- and σ-encoding loci the variable genes are located in different scaffolds. For this reason, these two loci are represented by separate horizontal lines. The figure is not drawn to scale. See details in Das et al. 2008.