Results 141 to 150 of about 86,320 (269)
Conservation and loss of ribosomal RNA gene sites in diploid and polyploid
BMC Plant Biology, 2011 Background The genus Fragaria comprises species at ploidy levels ranging from diploid (2n = 2x = 14) to decaploid (2n = 10x = 70). Fluorescence in situ hybridization with 5S and 25S rDNA probes was performed to gather cytogenetic information that ...
Liu Bo, Davis Thomas M
doaj +1 more source
Large-scale polymorphism of heterochromatic repeats in the DNA of
BMC Plant Biology, 2007 Background The composition of the individual eukaryote's genome and its variation within a species remain poorly defined. Even for a sequenced genome such as that of the model plant Arabidopsis thaliana accession Col-0, the large arrays of ...
Comai Luca, Tyagi Anand, Davison Jerry
doaj +1 more source
Insights into the phylogenetic positions of photosynthetic bacteria obtained from 5S rRNA and 16S rRNA sequence data [PDF]
Comparisons of complete 16S ribosomal ribonucleic acid (rRNA) sequences established that the secondary structure of these molecules is highly conserved.
Fox, G. E.
core +1 more source
Biotechnology & Biotechnological Equipment, 2017 Extraction of RNA of high quality and integrity is essential for gene expression studies and all downstream RNA-based techniques. The leaves of 16 merit Malaysian rice varieties were used to isolate total RNA using five different methods.
Parisa Azizi +7 more
doaj +1 more source
Trends in evolution of 5S rRNA of deuterostomes: bases and homogeneous clusters
Genetics and Molecular Biology, 2002 Evolution of metazoan 5S rRNA sequences was analyzed through base composition and types, location and frequency of clustered bases. Characters from sequences of protostomes did not show regular trends as compared with paleontology dating or organism ...
Sandra Maria Rodrigues Subacius +1 more
doaj +1 more source
Polytene chromosomes as indicators of phylogeny in several species groups of Drosophila. [PDF]
, 2001 BackgroundPolytene chromosome banding patterns have long been used by Drosophila evolutionists to infer degree of relatedness among taxa. Recently, nucleotide sequences have preempted this traditional method.
Baker, RH +4 more
core
The unknotted strands of life: knots are very rare in RNA structures [PDF]
arXiv, 2014 The ongoing effort to detect and characterize physical entanglement in biopolymers has so far established that knots are present in many globular proteins and also abound in viral DNA packaged inside bacteriophages. RNA molecules, on the other hand, have not yet been systematically screened for the occurrence of physical knots.
arxiv
Is wheat mitochondrial 5S ribosomal RNA prokaryotic in nature?
Nucleic Acids Research, 1981 Küntzel et al. (1981) (Nucleic Acids Res. 9, 1451-1461) recently concluded that the sequence of wheat mitochondrial 5S rRNA is significantly more related to prokaryotic than to eukaryotic 5S rRNA sequences, and displays an especially high affinity to that of the thermophilic Gram-negative bacterium, Thermus aquaticus.
David F. Spencer, Michael W. Gray
openaire +4 more sources
, 2013 Two groups of taxa can be distinguished within the genus Lolium L. based on the pollination system, chromosome size, chromosomal location of nrDNA (5S and 35S (18S-5.8S-26S)] and nrDNA phylogeny.
L. A. Inda, E. Wolny
semanticscholar +1 more source
Exploration of RNA structure spaces [PDF]
In order to understand the structure of real structure spaces, we are studying the 5S rRNA structure space experimentally. A plasmid containing a synthetic 5S rRNA gene, two rRNA promoters, and transcription terminators has been assembled.
Fox, G. E.
core +1 more source