For All CEE Members Please note the following CEE/GEE Seminar taking place tomorrow (Wednesday), at 5pm in UCL's A V Hill Lecture Theatre: Speaker: Dr Ivana Gudelj, NERC Advanced Fellow, Reader in Systems Biology, University of Exeter http://biosciences.exeter.ac.uk/staff/index.php?web_id=Ivana_Gudelj Understanding microbial evolution: system-specific models do produce general insights Ivana Gudelj, University of Exeter Is a group best off if everyone cooperates? Models of co-operation presume this to be so but our experiments show something different. In competition between "cheat" and "co-operator" strains of yeast, population fitness was maximised under co-existence. To understand this unexpected result we develop a systems model using the following key building block. Individual fitness is neither fixed nor predetermined rather it is determined directly from underlying biochemical and metabolic assumptions. We benchmark and test the model demonstrating that it can accurately describe our experimental outcome. But this is not the end of the story. By dissecting our model we are able to pinpoint mechanisms necessary to recover the unexpected result. Our findings suggest that this result is unlikely to be just a peculiarity of our yeast model system. With best wishes Jane Dempster Jane M Dempster Executive Officer to Professor Andrew Pomiankowski, Head of Research Department and to Professor Gabriel Waksman, Head of Research Department of Structural and Molecular Biology & CEE Administrator Darwin Building (Room 111), Gower Street, London, WC1E 6BT Tel: 020 7679 2246 (internal xt 32246) Fax: 020 7679 7193 E-mail: j.dempster@xxxxxxxxx<mailto:j.dempster@xxxxxxxxx> Departmental website: www.ucl.ac.uk/gee<http://www.ucl.ac.uk/gee>