ACI44, a metallo-carboxypeptidase inhibitor, is one member of a battery of selective inhibitors protecting roundworms of the genus Ascaris, common parasites of the human gastrointestinal tract, from host enzymes and the immune system [1].

1: Mammalian metallopeptidase inhibition at the defense barrier of Ascaris parasite. Sanglas L, Aviles FX, Huber R, Gomis-Ruth FX, Arolas JL; Proc Natl Acad Sci U S A. 2009;106:1743-1747. PMID:19179285