Figure 6From: Tracing the origin of functional and conserved domains in the human proteome: implications for protein evolution at the modular levelDistribution of Pfam-A families according to the origin in three kingdoms of life – archaea, bacteria and eukaryota. The codes for different nodes are: A, archaea; B, bacteria; E, eukaryota; E here represents eukaryota node and all nodes above it.Back to article page