Figure 4
Chromosomal distribution of TF genes in C. elegans (A) and C. briggsae (B). The maps have been plotted by taking all TF genes in non-overlapping 200 kb windows. The color codes are as follows. Red: NHR genes, blue: non-NHR TF genes, green: TF genes conserved among the three nematode species. Gene clustering was analyzed by comparing the numbers of TF and non-TF genes located in each window using a χ2 test. Gene clusters that are significantly enriched have been marked with stars (*: P < 0.05; ** P < 0.01; ***: P < 0.0001).