Figure 3.

Intergenic distance in the Hoxa clusters of several vertebrates. The Little Skate and Horn Shark intergenic distances are virtually identical. Ler -- Little Skate, Hfr -- Horn Shark, Hsa -- human, Xtr, Xenopus tropicalis, Lme -- Indonesian coelacanth, Pse -- Polypterus senegalus.

Mulley et al. BMC Evolutionary Biology 2009 9:218   doi:10.1186/1471-2148-9-218
Download authors' original image