SEM and TEM localization of FITC-FN on a platelet adherent on an FN-coated grid.

Samples were processed as in Figure 6. SEM without platinum coating demonstrates linear arrays of beads that extend from the platelet surface to the FN-coated substratum (arrowheads). TEM of the same platelet demonstrates beads decorating filaments (arrowheads) that are less than 20 nm in diameter. SEM after platinum (pt) coating demonstrates that one of the extensions is associated with a filopodial process (arrowheads).