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. 1999 May 31;145(5):1077–1088. doi: 10.1083/jcb.145.5.1077

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Activated R-Ras enhances adhesion to collagen but not fibronectin. (A) Cells expressing activated R-Ras(87L) (triangles) are more adherent to collagen I than control cells expressing vector alone (open squares). In contrast, cells expressing dominant negative R-Ras(41A) (filled squares) are less adherent to collagen I. (b) Cells expressing activated or dominant negative R-Ras are no different from control cells in their adhesion to fibronectin. Values in a and b are an average of two separate experiments, each of triplet determinations, ± SD.