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The venoms of two classes of fish, freshwater stingray (members of the genus Potamotrygon) and stonefish (members of the genus Synanceia), contain not only proteinaceous toxins but also hyaluronidases, which are considered as spreading factors that facilitate the tissue diffusion of toxins by degrading hyaluronan. So far, the freshwater stingray Potamotrygon motoro hyaluronidase and the stonefish...
Cephalopods contain toxins in their salivary glands, presumably to paralyze prey animals such as crabs and bivalves. Proteinaceous toxins (called cephalotoxins) with crab lethality have previously been purified from three species of octopodiform cephalopods (octopuses) but their detailed properties and primary structures have remained unknown. In this study, salivary glands of six species of decapodiform...
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