Fig. 5.

Exon–intron organization of cichlid (c) KLR, human (h) NKG2, and human (h) CD94 genes. Exons (E) are indicated by numbered boxes and introns by intervening lines. Lengths of exons are approximately proportional to the widths of the boxes; those of introns are not. Lengths (in base pairs) of cKLR exons and introns are as specified. The exon parts specifying different domains of the protein are distinguished by shading: CYR, cytoplasmic region; TMR, transmembrane region. The organization of the human genes is taken from refs. 20 and 21.