1. Faculty of Biology, Albert-Ludwigs-University Freiburg, Schänzlestraße 1, 79104 Freiburg, Germany
2. Freiburg Centre for Interactive Materials and Bioinspired Technologies, Albert-Ludwigs-University Freiburg, Georges-Köhler-Allee 105, 79110 Freiburg, Germany
3. Materials Theory, ETH Zürich, Wolfgang-Pauli-Straße 27, CH-8093 Zürich, Switzerland
4. Institute of Physics, Albert-Ludwigs-University Freiburg, Hermann-Herder-Straße 3, 79104 Freiburg, Germany
5. Signalling Resaerch Centers BIOSS and CIBSS, Albert-Ludwigs-University Freiburg, Schänzlestraße 18, 79104 Freiburg, Germany