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. 2011 Oct 1;5(4):345–351. doi: 10.4161/fly.5.4.17808

Figure 1.

Figure 1

Evolution of Slfc, a young duplicated serine endopeptidase. The simplified phylogenetic tree shows the origin of Slfc gene in the internal branch leading to the common ancestor of the Drosophila melanogaster species subgroup. The syntenic block from UCSC genome browser supports the presence of Slfc orthologs (orange star) in Drosophila melanogaster subgroup species (D. melanogaster, D. simulans, D. sechellia, D. yakuba, D. erecta), and the absence Slfc orthologs in outgroup species (D. ananassae, D. pseudoobscura, D. persimilis). Orange star in internal branch denotes the origin of the initial Slfc gene. Tree not drawn to scale. Levels 1–6 indicate the UCSC genome browser synteny alignment level between D. melanogaster and another species. Level 1 alignments with D. simulans, D. sechellia, D. erecta and D. yakuba show continuous synteny in these species; non-level 1 alignment with D. ananassae, D. pseudoobscura, D. persimilis and A. gambiae (Anopheles gambiae) show synteny breaks. Black and blue blocks are annotated gene regions. To view a color version of this figure, go to http://www.landesbioscience.com/journals/21/article/17808.