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The family of chromogranins/secretogranin peptides comprises three major subtypes: chromogranin A, chromogranin B and secretogranin II. We have characterized these proteins in rat vas deferens and pelvic ganglia by using two approaches. Firstly, extracts of rat vas deferens were subjected to molecular sieve chromatography followed by radioimmunoassay. The results indicate that, in the peripheral nerves...
As secretogranin II is considered to be a marker for the regulated secretory pathway, its distribution in the hypothalamo-neurohypophyseal system of salt-loaded Wistar rats was studied in detail by immunocytochemistry. Although after an osmotic challenge both vasopressin and oxytocin neurons are stimulated, secretogranin II was exclusively expressed in a subpopulation of vasopressinergic magnocellular...
Secretoneurin (SN) is a neuropeptide formed by endoproteolytic processing of secretogranin II (chromogranin C). Chromatographic analysis revealed that the human retina contains significant concentrations (14.2 fmol/mg wet weight) of this peptide. Its cellular localization in the retina was characterized by immunohistochemistry. SN-immunoreactive (IR) fibers showed a distinct distribution in central...
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