The fine structure of cell contacts in platelet aggregation

RJ Skaer, JP Emmines, HB Skaer - Journal of ultrastructure research, 1979 - Elsevier
Four distinct types of cell contact occur between human platelets aggregated by adenosine
diphosphate. These types make up a substantial proportion of the surface of aggregated
platelets and do not intergrade. They have intercellular spaces of width 50 nm, 20 nm, 2–5
nm (gap contacts), and 0 (tight contacts), respectively. The 50-nm spaces are spanned by
bridges that attach to stubs, abundant on the plasma membranes of circulating and
aggregated platelets, and described here for the first time. In sectioned material, gap …