Figure 1From: Assessing the evolutionary rate of positional orthologous genes in prokaryotes using synteny dataDifferentiating orthologous and paralogous relationships in phylogenetic trees. This simplified tree is adapted from a previous work on the evolution of carbamoyltranserases [60]. The nodes corresponding to the respective events of ancestral gene duplication D (creating paralogous groups of carbamoyltransferases) and speciation S1 and S2 are identified by a black circle and a gray diamond, respectively. The presence of in-paralogs is shown by thick branches leading to leaves corresponding to genes belonging to the same species.Back to article page