Figure 3.

Positions of inteins along the protein sequence of cell division control protein 21. Dark gray indicates the conservation profile of all domains. Light gray indicates the conservation profile of Eukaryotes only. Inteins are found in three sites "a-c", shown with arrows pointing at blue dots.

Swithers et al. BMC Evolutionary Biology 2009 9:303   doi:10.1186/1471-2148-9-303
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