Figure 2From: Deep ancestry of mammalian X chromosome revealed by comparison with the basal tetrapod Xenopus tropicalisRegions of homology between human X and Xenopus tropicalis, Gallus gallus and Monodelphis domestica chromosomes. Only gene blocks larger than 0.7 Mbp are shown. Data are from Additional file 1 and the Comparative Genomic display of the Ensembl database [18]. cen – centromere, chr. - chromosome.Back to article page