Results 261 to 270 of about 300,369 (293)

18S rRNA suggests that Entoprocta are protostomes, unrelated to Ectoprocta

Journal of Molecular Evolution, 1996
The Ento- and Ectoprocta are sometimes placed together in the Bryozoa, which have variously been regarded as proto- or deuterostomes. However, Entoprocta have also been allied to the pseudocoelomates, while Ectoprocta are often united with the Brachiopoda and Phoronida in the (super)phylum Lophophorata.
Mackey, L.Y., Winnepenninckx, B., de Wachter, R., Backeljau, T., Emschermann, P., Garey, J.R.   +5 more
openaire   +3 more sources

Novelty in Phylogeny of Gastrotricha: Evidence from 18S rRNA Gene

Molecular Phylogenetics and Evolution, 1999
Gastrotricha form a phylum which is crucial for defining the origin of pseudocoelomates, in that they share a number of characters with Rotifera and Nematoda but also with acoelomates, and even the evolutionary relationships within the phylum are anything but defined.
WIRZ A, PUCCIARELLI, Sandra, MICELI, Cristina, TONGIORGI P, BALSAMO M.   +4 more
openaire   +3 more sources

Details of Gastropod Phylogeny Inferred from 18S rRNA Sequences

Molecular Phylogenetics and Evolution, 1998
Some generally accepted viewpoints on the phylogenetic relationships within the molluscan class Gastropoda are reassessed by comparing complete 18S rRNA sequences. Phylogenetic analyses were performed using the neighbor-joining and maximum parsimony methods.
Winnepenninckx, B., Steiner, G., Backeljau, T., de Wachter, R.   +3 more
openaire   +3 more sources

N6-methyladenosine (m6A) in 18S rRNA promotes fatty acid metabolism and oncogenic transformation

Nature Metabolism, 2022
Hao Peng, Bin-bin Chen, Wei Wei, Siyao Guo, Hui Han, Chunlong Yang, Jieyi Ma, Lu Wang, S. Peng, Ming Kuang, Shuibin Lin   +10 more
semanticscholar   +1 more source

Cryptomonad nuclear and nucleomorph 18S rRNA phylogeny

European Journal of Phycology, 1996
Nuclear and nucleomorph 18S ribosomal RNA genes from six cryptomonads were amplified by the polymerase chain reaction and sequenced. Phylogenetic trees were constructed by distance, parsimony, and maximum likelihood methods for all available cryptomonad nuclear and nucleomorph 18S rRNA sequences.
T. Cavalier-Smith, J. A. Couch, K. E. Thorsteinsen, P. Gilson, J. A. Deane, D. R. A. Hill, G. I. Mcfadden   +6 more
openaire   +1 more source

The phylogenetic position of Siboglinidae (Annelida) inferred from 18S rRNA, 28S rRNA and morphological data

Cladistics, 2004
AbstractWe assess the phylogenetic position of Siboglinidae (previously known as the phyla Pogonophora and Vestimentifera, but now referred to Annelida) in parsimony analyses of 1100 bp from 18S rRNA, 320 bp from the D1 region of 28S rRNA, and 107 morphological characters, totaling 667 parsimony informative characters.
Rousset, Vincent, Rouse, Greg W., Siddall, Mark E., Tillier, Annie, Pleijel, Fredrik   +4 more
openaire   +3 more sources

Evidence that in higher plants the 25S and 18S rRNA genes are not interspersed with genes for 5S rRNA

Chromosoma, 1978
DNA samples from various higher plants (Phaseolus aureus, Glycine max, Matthiola incana, Brassica pekinensis, Cucumis melo) were centrifuged in actinomycin-caesium chloride gradients and the genes coding for the ribosomal RNAs were detected by hybridisation with tritium labelled 5S and 25S+18S rRNA, respectively.
Vera Hemleben, Donald Grierson
openaire   +1 more source

Methylation of snRNAs and 18S rRNA of Novikoff heptoma

1982
In the biosynthesis of mature snRNAs and rRNAs, RNA methylation is one of the important mechanisms involved in their posttranscriptional modifications. The processes of RNA methylation are catalyzed by RNA methylases which specifically recognize methylation sites. This enzymatic recognition of methylating sites is specific for particular species of RNA
Yong C Choi, Ramachandra Reddy, Harris Busch   +2 more
openaire   +1 more source

The Monophyly of Brachyuran Crabs: A Phylogenetic Study Based on 18S rRNA

Systematic Biology, 1992
A molecular approach was used to test hypotheses about the phylogeny of selected brachyuran crabs. Partial 18S ribosomal (r) RNA and rDNA sequences, ranging in length from 950 to 1,779 nucleotides, were obtained for 12 decapod crustaceans, 10 of which are generally considered to be brachyurans. Pairwise sequence-divergence estimates ranged from 0.5% to
T. Spears, L. G. Abele, W. Kim
openaire   +1 more source

Retrieval of a million high-quality, full-length microbial 16S and 18S rRNA gene sequences without primer bias

Nature Biotechnology, 2018
S. Karst, M. Dueholm, S. McIlroy, R. Kirkegaard, P. Nielsen, M. Albertsen   +5 more
semanticscholar   +1 more source