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The evolution of beta-defensin peptides in platypus venom gland

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The evolution of beta-defensin peptides in platypus venom gland
The diagram illustrates separate gene duplications in different parts of the phylogeny for platypus venom defensin-like peptides (vDLPs), for lizard venom crotamine-like peptides (vCLPs), and for snake venom crotamines. These venom proteins have thus been co-opted from pre-existing non-toxin homologues independently in platypus and in lizards and snakes.

This image is linked to the following Scitable pages:

Interpreting Shared Characteristics: The Platypus Genome

The sequencing of the platypus genome has received a high amount of misleading press attention. What does this information really tell us about this strangely unique animal and its genetic past?

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