Fig. 2From: Lipopolysaccharide Signals Activation of Tumor Necrosis Factor Biosynthesis Through the Ras/Raf-1/MEK/MAPK Pathway ERK2 activity in RAW 264.7 cells stimulated with varying concentrations of LPS RAW 264.7 cells were exposed to varying concentrations of LPS or left unstimulated after overnight culture in medium containing 0.5% FCS. Immune complex kinase assay was performed as described in Materials and Methods. Each point represents a single determination.Back to article page