Web Figure 14.2.A   Electron micrograph showing Golgi stacks and vesicles containing xyloglucan (large arrows) and glycosylated proteins (small arrows). This section, taken from a sycamore suspension-cultured cell, was labeled with two types of antibodies conjugated to colloidal gold particles (the large particles are attached to the antixyloglucan antibody; the small particles are attached to the antibody that detects glycosylated proteins).