Abstract: The present invention relates to a method for selecting a suitable expression construct from a plurality of expression constructs for optimizing the production of a protein or a fragment thereof in a host cell, a method for the production of proteins or fragment thereof using the selected expression vector, to novel human embryonic kidney cells that are deficient in N-acetyl-glucosaminyltransferase I and stably transfected with EBNA (HEK 293E GnTI?cells) that are well suitable for use in the said method, in particular for the production of proteins or protein fragments that are suitable for X-ray studies. The invention also relates to a method to produce HEK 293E GnTI? cells and a method to confer to HEK293E GnTI? cells, the capacity to grow in suspension and to a method to confer to HEK293E GnTI? cells, the capacity to grow in serum free medium. The invention also relates to a kit comprising different vectors suitable for use of the above method for the production of proteins or protein fragments.

Abstract: The invention relates to the adhesion of platelet GpIb? to strand ?3 of domain A1 of von Willebrand factor (vWF), the strand ?3 comprising amino acid residues at amino acid position 560-566 and/or a functional part or equivalent thereof, the platelet GpIb?, the GpIb? region comprising an amino acid sequence corresponding to a beta-switch loop of platelet GpIb?, comprising amino acid residues at amino acid position 227-242 and/or a functional part or equivalent thereof. The invention provides a method of interfering with adhesion of blood platelets to vWF that includes modulating adhesion. The invention further provides proteinaceous compounds, antibodies, medicaments and pharmaceutical compositions to that end. The invention also provides means and methods to increase platelet adhesion by topical application of a compound increasing platelet adhesion.