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Articles 361 - 361 of 361
Full-Text Articles in Oncology
Uptake, Storage And Secretion Of 5-Hydroxytryptamine And Its Amino Acid Precursor By Dispersed Rat Pancreas Acinar Cells, Ligia Stern, A. Tenenhouse, E. Yu
Uptake, Storage And Secretion Of 5-Hydroxytryptamine And Its Amino Acid Precursor By Dispersed Rat Pancreas Acinar Cells, Ligia Stern, A. Tenenhouse, E. Yu
Edward Yu
Rat pancreas acinar cells contain 5-hydroxytryptamine (5-HT; 10.86 +/- 2.52 ng/i.u. amylase), all of which can be accounted for by the 5-HT recovered from the zymogen granule fraction of these cells (10.70 +/- 3.06 ng/i.u. amylase). When incubated with [14C]5-HT dispersed acinar cells take up the amine and concentrate it in zymogen granules. These cells will also take up [14C]5-HTP (5-hydroxytryptophan), decarboxylate it and store the [14C]5-HT so produced in zymogen granules. 5-HTP itself is not taken up by the granules. 5-HT is incorporated into zymogen granules early in their formation; no amine is accumulated by mature zymogen granules and …