| Sumario: | This article looks at Deleuze and Guattari's understanding of molecular biology, focusing particularly on their reading of two highly influential works by the eminent French molecular biologists François Jacob and Jacques Monod, La logique du vivant (The Logic of Living Systems) and Le hasard et Ia nécessité (Chance and Necessity). In these two works, Jacob and Monod present the significance of molecular biology in broadly reductionist terms. What is more, the lac operon model of gene regulation that they propose serves to reinforce the so-called Central Dogma of molecular biology, according to which information passes from DNA to RNA to proteins, with no reverse route. However, Deleuze and Guattari discover intensive potentials within the descriptions of molecular biology offered by both writers. It is argued that Jacob's work in particular, as it has developed in the years since the publication of La logique du vivant in 1970, has itself developed these intensive potentials.
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