Linked Life Data

2956974

Source:http://linkedlifedata.com/resource/pubmed/id/2956974

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
5
pubmed:dateCreated
1987-10-22
pubmed:abstractText
Thermal transitions were measured by differential scanning calorimetry for rabbit cardiac sarcolemma in 3-(N-morpholino)propanesulfonic acid buffer at pH 7.5, in glycerol-buffer and dimethyl sulfoxide - buffer mixtures, after heat denaturation, and after enzymatic degradation of the proteins. Specific solvent effects on the protein transitions were observed. Glycerol stabilized some of the four protein transitions, while dimethyl sulfoxide destabilized all protein transitions. The thermal transitions in the lower temperature range were studied for both the membranes and the lipid extracted from the membranes. A very small endotherm was observed for both the lipid extracted from the sarcolemma and the intact membrane (0.1-0.2 cal/g; 1 cal = 4.1868 J). A larger endotherm was observed in both the glycerol-buffer and dimethyl sulfoxide - buffer mixtures. Major perturbation of the protein by enzymatic degradation (papain or trypsin digestion), by heat denaturation, or by reaction with excess N-ethylmaleimide all produced larger endotherms near 20 degrees C. The very small magnitude of the endotherm near 20 degrees C suggests that it is not a typical gel - liquid crystalline transition of the bilayer. However, the occurrence of an endotherm in the extracted lipid suggests that some reorientation of lipid is involved.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
May
pubmed:issn
0829-8211
pubmed:author
pubmed:issnType
Print
pubmed:volume
65
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
429-37
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1987
pubmed:articleTitle
Differential scanning calorimetry studies of rabbit cardiac sarcolemma.
pubmed:publicationType
Journal Article, In Vitro, Research Support, Non-U.S. Gov't