Cellular localization of monoamine oxidase in rat salivary glands.

After ligation of the excretory ducts and subsequent atrophy of the parenchymal cells of the rat sub-maxillary and sublingual glands, a severe reduction of the MAO activity was demonstrated both biochemically (more than 60 per cent decrease expressed as activity per gland) and histochemically. Chronic postganglionic sympathectomy produced a much smaller diminution of the MAO activity in these glands. It is concluded that the major part of the MAO in rat salivary glands occurs in the parenchymal cells.

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