FIGURE 3. A clear transition from low to high SNP rate between strains 129 and B6 in a 1-Mb region at the telomeric end of chromosome 5.
From the following article:
The mosaic structure of variation in the laboratory mouse genome
Claire M. Wade, Edward J. Kulbokas, III, Andrew W. Kirby, Michael C. Zody, James C. Mullikin, Eric S. Lander, Kerstin Lindblad-Toh and Mark J. Daly
Nature 420, 574-578(5 December 2002)
doi:10.1038/nature01252
a, Finished sequence NT_027601 when aligned against the B6 whole genome assembly demonstrates a low-SNP-rate region (the first 161 kb) followed by a high-SNP-rate region (the last 101 kb) and an abrupt transition between SNP rate regions. b, Whole genome shotgun reads from the same genomic region provide evidence of the same well-defined transition point. Bars correspond to 500-bp reads containing one or more SNPs (red), or no SNPs (blue) when compared with the B6 assembly.