Fig. 5
From: Horizontal gene transfer and genome evolution in Methanosarcina
Functional distribution of transferred genes and their operon structure. a Representation of horizontally transferred genes in COG categories (see the text for definitions). b The fraction of genes encoding enzymes or transporters among the HT genes and the whole genomes. c The fraction of genes included in operons among the HT genes, and the whole genomes. d Venn diagram representing the distribution of COGs with transcriptional factors among Archaea and Bacteria