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. 1967 Sep;104(3):705–715. doi: 10.1042/bj1040705

Some studies on the composition of bovine cortical-bone sialoprotein

A T De B Andrews 1,*, G M Herring 1, P W Kent 1
PMCID: PMC1271209  PMID: 6049914

Abstract

1. An analysis of bovine bone sialoprotein, a homogeneous glycoprotein isolated from cortical bone, is presented. 2. Analytical results agree with earlier physical measurements indicating a molecular weight of about 23000. 3. Mild acid hydrolysis and treatment with neuraminidase showed that fucose and sialic acid occupy terminal positions on oligosaccharide chains. 4. Treatment of the sialic acid-free glycoprotein with β-galactosidase showed that much of the galactose occupies a sub-terminal location in the intact glycoprotein. 5. The polypeptide chain is rich in aspartic acid, glutamic acid, serine, threonine and glycine, and has no detectable free terminal amino group. 6. Glycopeptides were studied after proteolytic digestion. 7. It is considered that the carbohydrate moiety is highly branched and is probably linked by an acid- and alkali-stable glycosylamine bond involving aspartic acid.

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Selected References

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