Institute of Molecular Systems Biology, ETH, Wolfgang-Pauli-Strasse 16, 8093 Zurich, Switzerland.|Institute of Molecular Systems Biology, ETH, Wolfgang-Pauli-Strasse 16, 8093 Zurich, Switzerland.|Institute of Molecular Systems Biology, ETH, Wolfgang-Pauli-Strasse 16, 8093 Zurich, Switzerland.|Institute of Molecular Systems Biology, ETH, Wolfgang-Pauli-Strasse 16, 8093 Zurich, Switzerland.