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The evolutionary origin and diversification of the reptilian venom system is described. The resolution of higher-order molecular phylogenetics has clearly established that a venom system is ancestral to snakes. The diversification of the venom system within lizards is discussed, as is the role of venom delivery in the behavioural ecology of these taxa (particularly Varanus komodoensis). The more extensive...
Venom proteins are added to reptile venoms through duplication of a body protein gene, with the duplicate tissue-specifically expressed in the venom gland. Molecular scaffolds are recruited from a wide range of tissues and with a similar level of diversity of ancestral activity. Transcriptome studies have proven an effective and efficient tool for the discovery of novel toxin scaffolds. In this study,...
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