Fig. 4From: A natural barrier to lateral gene transfer from prokaryotes to eukaryotes revealed from genomes: the 70 % ruleEukaryotes have relatively fewer non-singleton high-identity clades (HICs). Taxonomic groups are plotted according to their ratio of non-singleton HICs to singleton HICs against their number of taxa. Red: eukaryotes with all clades (Fig. 3a) or with clades of plastid origin removed (Fig. 3b); blue: prokaryotic groups based on the original eukaryotic-prokaryotic clusters (Fig. 2; Additional file 3: Figure S2); green: prokaryotic groups based on clusters generated using the same clustering procedure as for eukaryotes (Additional file 8: Figure S3)Back to article page