Mapping of Nev-Grh1 and Nev-Grh2 ESTs to separate loci. The NevGrh1 and NevGrh2 loci (enclosed in boxes) are flanked by distinct genes and are found on distinct, non-overlapping genomic scaffolds. Exons are indicated by black boxes, and introns are represented by solid black lines. Dotted lines represent the intergenic sequence leading to the nearest flanking genes. Flanking genes are named by species and NCBI number. The EST contigs for each locus are represented as thick blue lines beneath the exons that encode them. Figure is not to scale.