1. Biosurfaces Unit, CIC biomaGUNE, Paseo Miramon 182, 20009 Donostia, San Sebastian, Spain, Department of Biophysical Chemistry, University of Heidelberg, INF 253, 69120 Heidelberg, Germany, and Department of New Materials and Biosystems, Max-Planck-Institute for Metals Research, Heisenbergstrasse 3, 70569 Stuttgart, Germany, Q-Sense AB, Hängpilsgatan 7, 42677 Västra Frölunda, Sweden, and Department of Biological Chemistry, John Innes Centre, Norwich, NR4 7UH, U.K.