Switch to
Predicate | Object |
---|---|
rdf:type | |
lifeskim:mentions | |
pubmed:issue |
1
|
pubmed:dateCreated |
1975-7-28
|
pubmed:abstractText |
The concentration and temperature dependence of the self-association of ademosin-5'-triphosphate (ATP) in aqueous solution was studied by means of ultraviolet absorption spectroscopy and circular dichroism (CD). Of several possible models, a model was indefinite linear self-association, in which each step has the same equilibrium constant, describes the data best. The two different methods lead within experimental error to the same thermodynamic parameters. At pH 8.7, IN 1 M Tris and 0.5 M 7gCl-2, we find deltaH-0 equals -5.1 kcal/mole and deltaS-0 equals -13.0 e.u. These values do not differ much from those found for the self-association of uncharged bases and nucleosides in aqueous solution. The CD spectrum that results from the self-association is conservative and quite similar in shape to that observed for some stacked dinucleotides: it is interpreted as a first approximation within the framework of the exciton model.
|
pubmed:language |
eng
|
pubmed:journal | |
pubmed:citationSubset |
IM
|
pubmed:chemical | |
pubmed:status |
MEDLINE
|
pubmed:month |
Feb
|
pubmed:issn |
0301-4622
|
pubmed:author | |
pubmed:issnType |
Print
|
pubmed:volume |
3
|
pubmed:owner |
NLM
|
pubmed:authorsComplete |
Y
|
pubmed:pagination |
35-45
|
pubmed:dateRevised |
2000-12-18
|
pubmed:meshHeading |
pubmed-meshheading:236049-Adenosine Triphosphate,
pubmed-meshheading:236049-Binding Sites,
pubmed-meshheading:236049-Calorimetry,
pubmed-meshheading:236049-Circular Dichroism,
pubmed-meshheading:236049-Hydrogen-Ion Concentration,
pubmed-meshheading:236049-Kinetics,
pubmed-meshheading:236049-Magnesium,
pubmed-meshheading:236049-Mathematics,
pubmed-meshheading:236049-Models, Molecular,
pubmed-meshheading:236049-Molecular Conformation,
pubmed-meshheading:236049-Spectrophotometry, Ultraviolet,
pubmed-meshheading:236049-Temperature,
pubmed-meshheading:236049-Thermodynamics
|
pubmed:year |
1975
|
pubmed:articleTitle |
The self-association of ATP: thermodynamics and geometry.
|
pubmed:publicationType |
Journal Article
|