CONCLUSIONS : Collectively , these results suggest that Ras activation a ) induces distinct sets of downstream targets in the lens and cornea resulting in distinct cellular responses and b ) is sufficient for initiation but not completion of lens fiber differentiation .
O O O O O O O O B-GeneOrGeneProduct O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O