Fig. 5

Scatterplots of gene expression upon sugar-feeding against the number of connections for D. melanogaster (top) and N. vitripennis (bottom). Gene expression is presented as the absolute log2-transformed fold change and connections are the known log2-transformed number of protein-protein associations. There is a significant negative correlation in both species, represented as a linear model in the figures. Red triangles represent genes listed in KEGG Pathway map ‘Fatty acid metabolism’ (map01212), black dots represent all other genes. The median log2-transformed number of protein-protein associations of either gene group is represented by vertical arrows