F9 embryonic carcinoma cells fluorescently stained for vinculin (green) and actin (red) a) F9 cell line which has no vinculin. b) vinculin-null cells into which full length vinculin was introduced. c) vinculin-null cells with a partial vinculin lacking an aminoterminal domain introduced. d) vinculin-null cells with a mutant vinculin (one amino acid change) introduced. Bar=25 um. Dr. Weiming Xu. Laboratory of Dr. Eileen Adamson, the Burnham Institute.