1. Center for Biomolecular Recognition, Department of Medical Biochemistry and Genetics, Biochemistry Laboratory B, The Panum Institute, University of Copenhagen, Blegdamsvej 3c, DK-2200 Copenhagen N, Denmark; Pantheco A/S, Bøge Allé 3, DK-2970 Hørsholm, Denmark; and Laboratory for Stem Cell Research, Institute for Health Technologies, Aalborg University, Fredrik Bajers Vej 3B, DK-9220 Aalborg Ø, Denmark