Fig. 1From: A natural barrier to lateral gene transfer from prokaryotes to eukaryotes revealed from genomes: the 70 % ruleIdentification of clades and sister groups. For each tree, largest possible clade(s) and their respective sister group(s) are identified for different taxonomic groups (e.g., eukaryotes or bacilli). One (a, b) or more (c, d) clades can be present for a single taxonomic group, with close (a), divergent (b, c), or both close and divergent sister groupsBack to article page