Figure 1. Index of variability along chromosome 6.

For the inbred mouse strains indicated, the variance of the log₂ ratios of the signal intensities (see Supplemental Figure S1) for probes within each bin (500,000 bp/bin) was captured (see Methods for calculation). At 500,000 bp/bin, there is a total of 294 bins for chromosome 6. Each bar represents a bin along the chromosome. The bin size had minimal effect in capturing variability (Supplemental Figure S2). The horizontal line in each graph is at 2 standard deviations (sd). The NKC genomic region is highlighted by the filled rectangle. The NKC is positioned within the F3 band as indicated by the ideogram of chromosome 6.