Phylogenetic mid-point rooted tree of the GRs based on protein sequences. Outer rings represent the expression in body, mouthparts (T. castaneum: palps, mandible, labrum, and labium; D. melanogaster: palp and proboscis; An. gambiae: maxillary palp) and antenna as a percentage compared to the highest expressed gene according to the scale in the left upper corner. Note that the methods used to obtain the different expression data (RNAseq and microarray) are not directly comparable. This figure can, thus, only give an impression of the tissue-specific abundance of the transcripts. The scale bars within the trees represent 1 amino acid substitution per site. Potential sugar and fructose receptors are labeled and highlighted in yellow and in grey, and CO2 receptors are highlighted in orange. (PDF 1733 kb
