Phospho-Erk1 and Erk2 levels were elevated in the lens but not in the cornea and Spry 1 and Spry 2 , negative regulators of Ras-Raf-Erk signaling , were upregulated more in the corneal than in the lens epithelial cells .
I-GeneOrGeneProduct O B-GeneOrGeneProduct O O O O O O O O O O O O B-GeneOrGeneProduct I-GeneOrGeneProduct O B-GeneOrGeneProduct I-GeneOrGeneProduct O O O O B-GeneOrGeneProduct O O O O O O O O O O O O O O O