Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
11
pubmed:dateCreated
1981-2-19
pubmed:abstractText
Mitochondrial DNA (mtDNA) molecules from species of the genus Drosophila contain a region exceptionally rich in adenine + thymine (A+T). Using agarose gel electrophoresis and electron microscopy, we determined that in the mtDNA molecules of D. melanogaster, D. simulans, D. mauritiana, D. yakuba, D. takahashii, and D. virilis, the A+T-rich regions, which are 5.1, 4.8, 4.6, 1.1, 2.2, and 1.0 kilobase pairs in size, respectively, are at homologous locations relative to various common EcoRI and HindIII cleavage sites. Under conditions highly permissive for base pairing (35% formamide), heteroduplexes were constructed between EcoRI fragments and whole circular molecules of mtDNAs of the above mentioned six species in a variety of combinations. Complete pairing of molecules outside the A+T-rich region was found in all heteroduplexes examined. However, in contrast, A+T-rich regions of the different species failed to pair in all but those combinations of mtDNAs involving the three most closely related species. In heteroduplexes between D. melanogaster and D. simulans, and between D. melanogaster and D. mauritiana mtDNAs, up to 35% of the A+T-rich regions appeared double-stranded. These data indicate that much more extensive divergence of sequences has occurred in A+T-rich regions than in other regions of Drosophila mtDNA molecules.
pubmed:grant
pubmed:commentsCorrections
http://linkedlifedata.com/resource/pubmed/commentcorrection/6255406-1068475, http://linkedlifedata.com/resource/pubmed/commentcorrection/6255406-1104639, http://linkedlifedata.com/resource/pubmed/commentcorrection/6255406-112603, http://linkedlifedata.com/resource/pubmed/commentcorrection/6255406-114222, http://linkedlifedata.com/resource/pubmed/commentcorrection/6255406-233134, http://linkedlifedata.com/resource/pubmed/commentcorrection/6255406-273252, http://linkedlifedata.com/resource/pubmed/commentcorrection/6255406-404300, http://linkedlifedata.com/resource/pubmed/commentcorrection/6255406-4196292, http://linkedlifedata.com/resource/pubmed/commentcorrection/6255406-4630197, http://linkedlifedata.com/resource/pubmed/commentcorrection/6255406-4868544, http://linkedlifedata.com/resource/pubmed/commentcorrection/6255406-5339944, http://linkedlifedata.com/resource/pubmed/commentcorrection/6255406-6967, http://linkedlifedata.com/resource/pubmed/commentcorrection/6255406-745987, http://linkedlifedata.com/resource/pubmed/commentcorrection/6255406-825520, http://linkedlifedata.com/resource/pubmed/commentcorrection/6255406-827333, http://linkedlifedata.com/resource/pubmed/commentcorrection/6255406-99743
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jun
pubmed:issn
0305-1048
pubmed:author
pubmed:issnType
Print
pubmed:day
11
pubmed:volume
8
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
2439-52
pubmed:dateRevised
2009-11-18
pubmed:meshHeading
pubmed:year
1980
pubmed:articleTitle
Extensive diversity among Drosophila species with respect to nucleotide sequences within the adenine + thymine-rich region of mitochondrial DNA molecules.
pubmed:publicationType
Journal Article, Comparative Study, Research Support, U.S. Gov't, P.H.S., Research Support, U.S. Gov't, Non-P.H.S.