1. Center for Functional Materials, Department of Physical Chemistry, Åbo Akademi University, Porthansgatan 3-5, FI-2500 Turku, Finland
2. Department of Biology, Åbo Akademi University, Artillerigatan 6A, FI-20520 Turku
3. Turku Centre for Biotechnology, University of Turku and Åbo Akademi University, P.O. Box 123, FI-20521, Turku, Finland
4. Current address: The Breakthrough Toby Robins Breast Cancer Research Centre, Institute of Cancer Research, London SW3 6JB, United Kingdom