1. Department of Molecular Biology, University of Gdańsk1 and Laboratory of Molecular Biology (affiliated with the University of Gdańsk), Institute of Biochemistry and Biophysics, Polish Academy of Sciences2, Kładki 24, 80-822 Gdańsk, Poland
2. Departamento de Biologı́a Celular y del Desarrollo, Centro de Investigaciones Biológicas (CSIC), Velázquez 144, 28006 Madrid, Spain3
3. Center for Molecular Genetics and Department of Biology, University of California at San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA4
4. Marine Biology Center, Polish Academy of Sciences, Św. Wojciecha 5, 81-347 Gdynia, Poland5