Figure 2
From: The origin and evolution of ARGFXhomeobox loci in mammalian radiation
ARGFX gene in vertebrates. The phylogenetic tree of mammals is based on [29–32]. Column 1: ARGFX is inferred to be a probable gene (√), possible pseudogene with disrupted coding region (ψ), secondarily completely lost (×) or not included in current genome data (?). Column 2: Minimal number of retrotransposed ARGFX pseudogenes based on current genome data. Column 3: Synteny with the human ARGFX genomic region is conserved (√) or not (×), or not sequenced (?).