Linked Life Data

3107779

Source:http://linkedlifedata.com/resource/pubmed/id/3107779

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
5
pubmed:dateCreated
1987-7-20
pubmed:abstractText
Proteoglycans from bovine nasal septa or the Swarm rat chondrosarcoma, as potassium salts, effectively inhibit the precipitation of tricalcium phosphate in vitro at pH 7.8. The same preparations, and many other similar preparations, however, do not site bind calcium, as assessed with a calcium ion specific electrode. However, after treatment of aggregate preparations of proteoglycans with EDTA, the preparations can site bind calcium. The amount thus bound is approximately equal to one-half the sum of the equivalents of the ester sulfate and the uronic acid carboxyl groups in the preparations. This latter observation suggested the possibility that the supposed potassium salts of the proteoglycans had, in the course of preparation, acquired calcium and held onto it strongly. In checking this possibility, using neutron activation analysis, it was found that some of the preparations do contain small amounts of calcium but these amounts are insufficient to saturate the binding sites potentially available to this end. In view of the above observations, it is suggested that the proteoglycans inhibit the formation of calcium phosphate precipitates in vitro not because the calcium is site bound but because the calcium ions are territorially bound.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
May
pubmed:issn
0171-967X
pubmed:author
pubmed:issnType
Print
pubmed:volume
40
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
265-9
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1987
pubmed:articleTitle
Binding of calcium by proteoglycans in vitro.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S.