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English: Consensus co-expression network of secondary cell wall genes from seven plant species. Gene vicinity co-expression networks of the Arabidopsis CESA7 homologs from barley, rice, poplar, medicago, soybean, and wheat were compared for re-occurring gene families (PFAMs). Nodes with their respective PFAM description indicate gene families that are enriched across species. Nodes and edges colored green, orange, and red represent gene families and co-expression relationships between them, that are present in at least five, four or two of the selected networks, respectively. For example, in at least five of the seven co-expression networks from the different species there is at least one gene belonging to the gene family DUF579 (green node in the upper right center). Bold PFAMs indicate gene families from which we selected genes for further analysis. This network was generated using the Network Comparer Tool from PlaNet (http://aranet.mpimp-golm.mpg.de/aranet/NetworkComparer; Mutwil et al., 2011), and red nodes were removed for clarity.