Localization of glycoproteins in insulin secretory granules by ultrastructural autoradiographyA Haddad, B Kopriwa and G Pelletier
To determine whether or not the secretory granules of insulin-secreting cells contained glycoproteins, isolated rat pancreatic islets were incubated for 2 and 4 hr in a medium containing L-[3H]-fucose. Quantitative analysis of high-resolution electron microscopic autoradiographs of the insulin-secreting beta cells demonstrated that glycoproteins with fucose residues are contained within the insulin secretory granule.
Volume 35,
Issue 10,
pp. 1059-1062,
10/01/1987
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