Cover photo shows the distribution of GP Ib-IX complexes on human platelets as seen by immunogold staining and scanning electron microscopy. Binding of murine monoclonal antibody to GP Ib was located by goat anti-mouse IgG coupled to 15 nm gold particles and silver enhancement. Courtesy of Hourdillé et al, "Thrombin Induces a Rapid Redistribution of Glycoprotein Ib-IX Complexes Within the Membrane Systems of Activated Human Platelets," p 1503.