Fig. 6. Membrane-bound structures containing subunits of VWF in cells fixed by HPF. (A-C) Subunits in membrane-bound structures (arrowheads), adjacent to the Golgi in B and C, and with arrows indicating possible connections between subunits in C. Bars, 200 nm. (D) Combination of subunits (closed arrowheads) and cross-sections (open arrowheads). Bar, 200 nm. (E) Cross-sections only (open arrowheads). Bar, 200 nm. G, Golgi.