Department of Biosystems Science and Engineering, ETH Zürich, 4058 Basel, Switzerland.|Department of Biosystems Science and Engineering, ETH Zürich, 4058 Basel, Switzerland.|Institute of Microbiology.|Department of Biosystems Science and Engineering, ETH Zürich, 4058 Basel, Switzerland.|Department of Chemistry and Applied Biosciences, ETH Zürich, 8093 Zürich, Switzerland.|Department of Biosystems Science and Engineering, ETH Zürich, 4058 Basel, Switzerland.|Institute of Microbiology.|Department of Biosystems Science and Engineering, ETH Zürich, 4058 Basel, Switzerland.|Department of Biosystems Science and Engineering, ETH Zürich, 4058 Basel, Switzerland.