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In situ hybridization for pancreatic insulin and glucagon RNA. Pancreatic paraffin sections of non-CF (left) and CF (right) animals were used for RNA in situ hybridization for insulin (blue) and glucagon (red). Ages of the animals evaluated are given on the left. The right column of photomicrographs for each genotype is an enlargement of the boxed region in the left set of photomicrographs.
