a, High-magnification images of the samples represented in Fig. 1c. Scale bars, 5 μm. Dcp2, the catalytic subunit of the Dcp1–Dcp2 mRNA decapping complex, is used as a marker of processing bodies. Images are representative of more than four independent experiments. b, Clustal Omega sequence alignment of yeast DDXs (Dhh1 and Ded1) and their human counterparts (DDX6X and DDX3X, respectively). The RecA core is displayed in green; asterisks indicate sequence identity, dots represent sequence similarity. c, Schematic representation of low-complexity sequence distribution in the unstructured tails of Arabidopsis thaliana DDXs. Clustal Omega sequence alignment of yeast Dhh1 with its three A. thaliana orthologues (AT4G00660, AT3G61240 and AT2G45810).