Figure 2.

Evolutionary distribution of FAM20 gene number. An idealized evolutionary tree (modified from [10]) is shown with the number of FAM20 genes identified in several genomes as described in the text. The gene numbers are supportive of a single gene duplication event occurring in invertebrates (at least in insects) and multiple gene duplication events occurring in higher vertebrates.

Nalbant et al. BMC Genomics 2005 6:11   doi:10.1186/1471-2164-6-11
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