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Much as yeast serves in bakeries as single-celled helper, the bacterium Escherischia coli is a must in every biotechnology lab. A team led by Prof. Dr. Barbara Di Ventura, professor of biological signaling research at the University of Freiburg, has developed a new so-called optogenetic tool that simplifies a standard method in biotechnology: Instead of feeding the bacteria with sugar as commonly done, the researchers can now simply shine light on them. Di Ventura, Prof. Dr. Mustafa Hani Khammash from ETH Zurich/Switzerland and their teams, foremost first authors Edoardo Romano and Dr. Armin Baumschlager, published their results in