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Fig. 3. Cellular distribution of phosphorylated ERK in primary hepatocytes (A),
RTgill-W1 cells (B) and RTH-149 hepatoma cells (C) from rainbow trout
stimulated by exposure to hypo-osmolarity (Hypo), EGF or Cu, in the absence or
presence of leptomycin B (LB), as indicated. Cells were stained with an
antibody against the dually phosphorylated form of ERK and a FITC-labelled
secondary antibody and were then examined by confocal laser scanning
microscopy. The right panel in the top row in A shows a negative control
(Neg.) stained in the absence of the primary antibody. Scale bars, 20 µm
(valid for all images in B and C).