Linked Life Data

350278

Source:http://linkedlifedata.com/resource/pubmed/id/350278

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
1978-8-14
pubmed:abstractText
In vitro transcription of ribosomal RNA was studied on the DNA of the transducing bacteriphage lambdarifd 18, which carries an rRNA transcription unit from Escherichia coli. rRNA synthesis was preferential at all polymerase/DNA ratios tested, and at the optimal 0.3 weight ratio nearly 60% of the transcript was rRNA. At this ratio the principal product of transcription comigrated in acrylamide-agarose electrophoresis with authentic 30-S rRNA precursor synthesized in vivo. In the presence of rifampicin more than one equivalent of rRNA was synthesized, thus suggesting the existence of two initiation sites for rRNA on the phage DNA. Similar results were obtained on E. coli DNA. Preincubation with heparin virtually eliminated the transcription of rRNA, in sharp contrast with the results of similar experiments on bacterial DNA where rRNA genes were transcribed 4--5 times in the presence of heparin. The possible explanation of this difference between rRNA promotors on the phage and the bacterial DNA are discussed.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Apr
pubmed:issn
0006-3002
pubmed:author
pubmed:issnType
Print
pubmed:day
27
pubmed:volume
518
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
257-66
pubmed:dateRevised
2002-11-1
pubmed:meshHeading
pubmed:year
1978
pubmed:articleTitle
In vitro transscription of ribosomal RNA on phage lambdarifd 18 DNA.
pubmed:publicationType
Journal Article