Table 1. Morphometry from 10 cell profiles.

Organelles	EGF at 1.5 ng/ml, % (n)	EGF at 20 ng/ml, % (n)
Labeled caveolae	4 (72)	22 (106)
Labeled coated pits	40 (35)	30 (46)
Gold in caveolae	1 (296)	12 (383)
Gold in coated pits	16 (296)	15 (383)

Shown is the percentage of labeled organelles, with values in parentheses representing the number of caveolae or coated pits counted, or the percentage of gold particles in organelles, with the values in parentheses representing the total gold particles detected on the plasma membrane.