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Phylogenetic dating of SINE28. Left are listed all 27 SINE28 loci in the human genome (hg19). Blue bars indicate the presence of SINE28 at the orthologous locus of the species indicated at the bottom. White boxes indicate an element missing at an orthologous locus. Purple are “outlier” orthologous SINE28s found in the dog and elephant genomes. Cladogram is not to scale; numbers on cladogram represent millions of years since a last shared common ancestor (Hedges et al. 2006).
