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Distribution of archaeal TFs shared by the three cellular domains, archaea, bacteria, and eukarya. Pie chart showing the distribution of archaeal TF homologues identified in different domains of life; Blast searches were performed between all TFs previously identified against total sequences of bacterial and eukaryotic genomes. A protein was considered as homologue if the alignment covered at least ≥60% of the query sequence, with an E value ≤10−6.
