1. Department of Biochemistry and Molecular Biology; University of Southern Denmark; DK-5230 Odense M Denmark
2. Department of Biochemistry; Weill Medical College of Cornell University; York Ave. 1300 10065 NY USA
3. Department of Biomedicine; University of Aarhus; DK-8000 Aarhus C. Denmark
4. Department of Molecular Biology and Genetics; University of Aarhus; DK-8000 Aarhus C. Denmark