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Predicate | Object |
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rdf:type | |
lifeskim:mentions | |
pubmed:issue |
3
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pubmed:dateCreated |
1990-4-26
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pubmed:abstractText |
Less purified fractions of ribonuclease H IIa activity of calf thymus display divalent cation-dependent ribonuclease H activity and divalent cation-independent ribonuclease activity. Because the ratio of the two enzyme activities does not change during successive chromatographic procedures, we suggest that ribonuclease H IIa activity is indeed able to degrade both ssRNA and the RNA moiety of RNA.DNA-hybrids. Ribonuclease H IIa activity can therefore be differentiated from calf thymus ribonuclease H I and H IIb by its lack of ribonuclease H specificity. The native molecular mass of ribonuclease H IIa activity is between 23 and 28 kDa. Under denaturing conditions a 23 kDa-protein band copurifies with the enzyme activity suggesting that this enzyme is monomeric.
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pubmed:language |
eng
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pubmed:journal | |
pubmed:citationSubset |
IM
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pubmed:chemical | |
pubmed:status |
MEDLINE
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pubmed:month |
Mar
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pubmed:issn |
0014-4754
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pubmed:author | |
pubmed:issnType |
Print
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pubmed:day |
15
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pubmed:volume |
46
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
319-21
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pubmed:dateRevised |
2007-11-15
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pubmed:meshHeading |
pubmed-meshheading:1690146-Animals,
pubmed-meshheading:1690146-Cattle,
pubmed-meshheading:1690146-Electrophoresis, Polyacrylamide Gel,
pubmed-meshheading:1690146-Endoribonucleases,
pubmed-meshheading:1690146-Molecular Weight,
pubmed-meshheading:1690146-Protein Denaturation,
pubmed-meshheading:1690146-RNA,
pubmed-meshheading:1690146-Ribonuclease, Pancreatic,
pubmed-meshheading:1690146-Ribonuclease H,
pubmed-meshheading:1690146-Substrate Specificity,
pubmed-meshheading:1690146-Thymus Gland
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pubmed:year |
1990
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pubmed:articleTitle |
Calf thymus ribonuclease H IIa activity lacks ribonuclease H specificity.
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pubmed:affiliation |
Lehrstuhl für Allgemeine Genetik, Universität Tübingen, Federal Republic of Germany.
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pubmed:publicationType |
Journal Article,
Research Support, Non-U.S. Gov't
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