Research interests include determining protein structures and studying the structure/function of complexes formed with drugs and natural ligands. Key developments in recent years includes (i) Determination of the first structure of an integrin/collagen complex. This structure revealed the molecular basis of the contacts formed between cells and the extracellular matrix. (ii) Determination of the platelet receptor glycoprotein Ib extracellular domain and von Willebrand factor A1 domain structures (iii) determination of the coagulation factor xi structure. These proteins are vital to normal platelet adhesion and hemostatic function. We also have collaborative interests in determining structures of protein complexes formed with anti-cancer and anti-thrombosis inhibitors. These structures provide scaffolds which can pave the way for design of improved therapeutic agents.