Fig. 1From: A repertoire of protease inhibitor families in Amblyomma americanum and other tick species: inter-species comparative analysesPI repertoire for four major medically important tick species. The count of protease inhibitors (PIs) in each PI family for Amblyomma americanum, Amblyomma maculatum, Ixodes scapularis and Ixodes ricinus are shown. PI families where total count was less than ten were excluded from the graphsBack to article page