From chemical reactions to evolution: emergence of species

Timoteo Carletti, Duccio Fanelli

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    Abstract

    The Chemoton model constitutes a minimalistic description of a protocell unit. The original formulation assumes three coupled chemical networks, representing a proto'metabolism, a template duplication and the membrane growth. An improved version is here proposed that explicitly incorporates the effects of the volume changes, due to the membrane growth. A stochastic mechanisms is also introduced that mimics a stochastic source of error in the template duplication process. Numerical simulations are performed to monitor the time evolution of a family of protocells, under the chemoton hypothesis. An open'ended Darwinian evolution under the pressure of the environment is reproduced thus allowing to conclude that differentiation into species is an emergent property of the model.
    Original languageEnglish
    Pages (from-to)18005
    JournalEurophysics Letters
    Volume77
    Publication statusPublished - 2007

    Keywords

    • Chemical kinetics and dynamics.
    • Theory and modeling; computer simulation
    • Dynamics of evolution

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