Abstract
1. 1. The distal and proximal segments of the anterior esophagus of Busycon canaliculatum were examined for the presence of biogenic amines using histochemical and chromatographic techniques. 2. 2. Glyoxylic acid treatment of the esophagus, esophageal nerve and buccal ganglia revealed green fluorescing, catecholaminergic, varicose axons. 3. 3. Chromatographic analysis using high performance liquid chromatography indicated the presence of dopamine in all structures containing fluorescent nervous structures. 4. 4. The possible function of dopamine in the esophageal musculature is considered.
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