Fig. 2From: Molecular characterization of a Trichinella spiralis elastase-1 and its potential as a diagnostic antigen for trichinellosisPhylogenetic tree of elastases of 19 organisms generated with MP method (a) and the predicted 3-dimensional structure of TsEla protein (b, c). b The predicted catalytic site Ile of the TsEla (in yellow). c Three serine protease-specific active sites (His, Asp and Ser) of TsEla, which are marked as redBack to article page