The present invention provides a fusion protein comprising (a) the
extracellular domain of glycoprotein VI or a variant thereof that is
functional for binding to collagen and (b) the Fc domain of an
immunoglobulin or a function-conservative part thereof, characterised by
a polypeptide chain having an amino acid sequence as shown in FIG. 7 and
whereby the fusion protein is obtainable by a process which provides the
fusion protein in the form of a specific dimer.