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Predicate | Object |
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rdf:type | |
lifeskim:mentions | |
pubmed:issue |
16
|
pubmed:dateCreated |
1981-10-25
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pubmed:abstractText |
A 1H NMR study of histidine hydrochloride dissolved in water/dimethyl sulfoxide mixtures gives evidence that dimethyl sulfoxide is able to induce a proton transfer from the imidazolinium nitrogens (mainly N3) to the carboxylate group when its mole fraction becomes greater than 42%. The new tautomeric equilibrium AH2++- in equilibrium AH2+ is quantitatively studied as a function of the solvent composition. In pure dimethyl sulfoxide, this equilibrium is strongly biased toward the monocation AH2+, which represents 91% of the total histidine hydrochloride.
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pubmed:language |
eng
|
pubmed:journal | |
pubmed:citationSubset |
IM
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pubmed:chemical | |
pubmed:status |
MEDLINE
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pubmed:month |
Aug
|
pubmed:issn |
0021-9258
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pubmed:author | |
pubmed:issnType |
Print
|
pubmed:day |
25
|
pubmed:volume |
256
|
pubmed:owner |
NLM
|
pubmed:authorsComplete |
Y
|
pubmed:pagination |
8569-72
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pubmed:dateRevised |
2006-11-15
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pubmed:meshHeading |
pubmed-meshheading:7263671-Dimethyl Sulfoxide,
pubmed-meshheading:7263671-Histidine,
pubmed-meshheading:7263671-Hydrogen-Ion Concentration,
pubmed-meshheading:7263671-Kinetics,
pubmed-meshheading:7263671-Magnetic Resonance Spectroscopy,
pubmed-meshheading:7263671-Mathematics,
pubmed-meshheading:7263671-Solvents
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pubmed:year |
1981
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pubmed:articleTitle |
Proton transfer in histidine hydrochloride induced by a dipolar aprotic solvent.
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pubmed:publicationType |
Journal Article,
Research Support, Non-U.S. Gov't
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