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Evolutionary Emergence of the miR390-TAS3-ARF Pathway in Land Plants.
A simplified phylogenetic tree of plants is drawn on the left. The evolution of each component of the miR390-TAS3-ARF pathway is denoted by arrows of different color on the right. Major evolutionary events are labeled at the corresponding points (referring to the phylogenetic tree). “AGO*” denotes that AGO proteins emerged much earlier than the appearance of plants.
