| http://www.w3.org/ns/prov#value | - Specifically, because proteases, in particular cysteine proteases, have been shown to exist in the invading miracidia and primary sporocyst stages of the parasite (Yoshino et al., 1993; Fryer et al., 1996), we thought it plausible that the presence of similar enzymes, or their natural inhibitors (in the snail),
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