Results 261 to 270 of about 126,234 (299)

Visualizing human 5S rDNA

Chromosome Research, 1997
[No abstract available]
PELLICCIA, Franca, L. Gaddini, M. Z. Limongi, ROCCHI, Angela   +3 more
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rDNA and acrocentric chromosomes in man

Cell Differentiation, 1974
A malformed female infant was found to have a 46,XX complement with a chromosome 8 shorter than normal with a secondary constriction and satellites on the short arm. Chromosome studies on the clinically normal father showed a balanced translocation between chromosome 8 and 13, i.e., 46,XY,t(8;13) (p21 p12). The proposita, carrier of the unbalanced form
G, Guanti, P, Petrinelli
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Phylogeny of Hesionidae (Aciculata, Polychaeta), assessed from morphology, 18S rDNA, 28S rDNA, 16S rDNA and COI

Zoologica Scripta, 2006
We assess phylogenetic relationships within the polychaete family Hesionidae from morphological data combined with nucleotide data from 18S rDNA, 28S rDNA, 16S rDNA and COI. Parsimony and Bayesian analyses were performed on two data sets; the first was based on a more restricted set of terminals with both morphological and molecular data (17 ingroup ...
Christine Ruta, Arne Nygren, Vincent Rousset, Per Sundberg, Annie Tillier, Helena Wiklund, Fredrik Pleijel   +6 more
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The Dictyostelium discoideum 5S rDNA Is Organized in the Same Transcriptional Orientation as the Other rDNAs

Biochemical and Biophysical Research Communications, 1993
In eukaryotes 5S rRNA genes are transcribed by RNA polymerase III. These genes occur in D. discoideum on the ca. 90 copies of an extrachromosomal palindrom together with the other ribosomal RNAs, which are generally transcribed by RNA polymerase I. A 5S rRNA gene has been isolated and its nucleotide sequence as well as the organization of the gene ...
J, Hofmann, T, Winckler, A, Hanenkamp, M, Bukenberger, G, Schumann, R, Marschalek, T, Dingermann   +6 more
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rDNA magnification in D. melanogaster: State of rDNA copies following the first step

Molecular and General Genetics MGG, 1979
D. melanogaster males of XYbb/O genetic constitution undergoing rDNA magnification were mated singly to XXbb+/O females, yielding XYbb/O male progeny, and to XNO- w sn bb+ females, yielding XYbb/XNO- females. The male and female offspring were scored for the bb+ phenotype.
Graziani F, LA MANTIA, GIROLAMA
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Molecular structure of the rDNA intergenic spacer (IGS) in Triturus: implications for the hypervariability of rDNA loci

Chromosoma, 1997
Ribosomal DNA (rDNA) variation in the species Triturus vulgaris meridionalis (Amphibia, Urodela) is remarkable because of unusually high intraspecific variability in the number and distribution of ribosomal loci in the karyotype; in addition, portions of the intergenic spacer (IGS) are clustered at chromosomal loci where they are not associated with ...
DE LUCCHINI, STEFANIA, ANDRONICO F, NARDI I.   +2 more
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Ribosomal RNA and rDNA sequence analyses

Gene, 1992
The potential of ribosomal (r) RNA and the encoding genes (rDNA) to elucidate natural relationships has been dramatically extended by improved sequencing approaches and the application of polymerase chain reaction. Sequence information on 16S and 23S rRNA/DNA from 69 strains of 53 Streptomyces species allows determination of regions that can be used as
Stackebrandt, Erko, Liesack, Werner, Witt, Dagmar   +2 more
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Quantitative studies of rDNA in amphibians

Journal of Cell Science, 1977
ABSTRACT The proportion, of the genome that is complementary to 18 and 28 s has been determined for 12 species of amphibians. The group of species chosen for the experiment includes 5 related species belonging to the same genus (Plethodon) as well as species belonging to distant taxonomic groups whose C-values range from 3 to 62 pg.
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A new role of the rDNA and nucleolus in the nucleus—rDNA instability maintains genome integrity

BioEssays, 2008
AbstractThe nucleolus is a region of the nucleus with high protein density and it acts as a ribosome factory. The nucleolus contains a distinct region of the genome, the ribosomal RNA gene repeats (rDNA) that supply ribosomal RNA (rRNA) molecules.
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RDNA SYN001

RDNA-SYN-001: Nature Biotechnology March 17 2026 reports generative AI models that are manufacturing-constraint-aware, enabling petascale DNA synthesis — 10^15 to 10^17 designed sequences — at trillion-fold reduced cost, producing realistic antibodies, T-cell receptors, and polymerases that are synthesizable on existing platforms without sequential ...
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