Average Illumina reads of nymphal and female I. ricinus Kunitz-domain transcripts. Each Cys motif group (G1-G11) was graphed to depict their overall distribution of their average Illumina reads (y-axis) sequenced from four independent I. ricinus SG cDNA libraries (x-axis) – two nymphal stages (EN and LN) and two adult stages (EA and LA). For a detailed account on the specifics of these I. ricinus cDNA libraries see Schwarz et al. 2013 . Panel A represents putative serine protease inhibitors (G1 and G7) with a distinct Illumina read profile in nymphs and female adult SGs of their encoding transcripts compared with the encoding putative ion channel blockers/modulators of panel B (G2, G4, G5 and G8-10). Panel C depicts that G3 and G11 share a similar profile to ion channel blockers/modulators (B) and that Kunitz-domain transcripts of G6 show a third profile in ticks completely distinct from all other groups. Standard deviations are represented as error bars.