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English
Etymology
From proto- + toxin.
Noun
prototoxin (plural prototoxins)
- Any substance that is converted into a toxin
2015 October 10, “Clostridium Perfringens Epsilon Toxin Binds to Membrane Lipids and Its Cytotoxic Action Depends on Sulfatide”, in PLOS ONE, →DOI:Etx is synthesized as a non-active prototoxin form (proEtx) that becomes active upon proteolytic activation.