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Clemson researchers find snake venom complexity is driven by prey diet


Credit: Kyle Hutchison
Diversity in diet plays a role in the complexity of venom in pit vipers such as rattlesnakes, copperheads and cottonmouths.
But new collaborative research by Clemson University scientists found the number of prey species a snake ate did not drive venom complexity. Rather, it was how far apart the prey species were from each other evolutionarily.
It s not just diet that drives the variation in venom across snakes. It s the breadth of diet, said Christopher Parkinson, a professor in the College of Science s Department of Biological Sciences. If a snake eats 20 different species of mammals, its venom will not be very complex. But if it eats a centipede, a frog, a bird and a mammal, it s going to have a highly complex venom because each component of that venom is affecting something different in one of the different animals the snake is feeding upon. ....

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