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Peptide Mapping Studies of the Chromogranins and of Two Chromaffin Granule Proteoglycans
Author(s) -
Banerjee Sila,
Margolis Richard U.
Publication year - 1982
Publication title -
journal of neurochemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.75
H-Index - 229
eISSN - 1471-4159
pISSN - 0022-3042
DOI - 10.1111/j.1471-4159.1982.tb08005.x
Subject(s) - granule (geology) , chromaffin cell , chemistry , neuroscience , biology , adrenal medulla , catecholamine , paleontology
The chromogranins, a family of related acidic glycoproteins, and two chondroitin sulfate/dermatan sulfate proteoglycans were isolated from the soluble contents of bovine adrenal chromaffin granules by chromatography on DEAE‐cellulose. These chromaffin granule matrix glycoconjugates were treated with trypsin, and the resulting peptides were fractionated by HPLC. The two proteoglycans, which differ in their concentration of glycosaminogly‐cans and glycoprotein oligosaccharides, yielded almost identical peptide patterns and would both appear to have the same protein moiety. The peptide profile of the proteoglycans differs, however, from that of the chromogranins, which they closely resemble in terms of amino acid composition. The various chromogranin fractions obtained by gel filtration were also found to have significant differences in the chromatographic patterns of their tryptic peptides.