Ultrastructural localization of alkaline phosphatase activity in the intestine of developingRana Catesbeiana

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Abstract
Summary Alkaline phosphatase activity has been localized at the light and electron microscopic levels in the intestine of developing frog,Rana catesbeiana. The intensity of the histochemical reactivity decreases along the intestinal tract. The intracellular localization of the enzymatic activity shows continuous series of organelles loaded with the reaction product from the Golgi zones to the brush border. These results are in agreement with the biochemical observations made on the same material.