Figure 13.

The RAX2 gene has been lost in rodent genomes. The RAX2 gene is located in syntenic regions of human and chicken (orange arrows), but absent at the equivalent location in mouse and rat. Non-homeobox genes used as indicators of chromosomal synteny are shown as grey arrows.

Zhong and Holland BMC Evolutionary Biology 2011 11:169   doi:10.1186/1471-2148-11-169
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