Assertion: komodo dragon's body | /r/HasProperty | recruited through gene-duplication events
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text: What can be said, however, is that 'all venomous reptiles have characteristic protein-secreting glands (that are not homologous to any salivary gland) and that the proteins secreted are not salivary proteins but rather proteins normally secreted elsewhere in the body that are recruited through gene-duplication events, with subsequent mutation to potentiate a previously useful activity or to derive new toxic activities.