The genetic relatedness among various strains of halophilic bacteria has been assessed by deoxyribonucleic acid-deoxyribonucleic acid (DNA-DNA) duplex formation and ribosomal ribonucleic acid (RNA) hybridization. All of the strains of extremely halophilic rods are closely related, and the extent of divergence of base sequence is similar for the major and minor DNA components. Parallel experimen...

Ribosomal RNAs (rRNAs) in budding yeast are encoded by ~100-200 repeats of a 9.1kb sequence arranged in tandem on chromosome XII, the ribosomal DNA (rDNA) locus. Copy number of rDNA repeat units in eukaryotic cells is maintained far in excess of the requirement for ribosome biogenesis. Despite the importance of the repeats for both ribosomal and non-ribosomal functions, it is currently not know...

Here the data on evolutionary relationships of persistent bacteria from water tanks and their close relatives are shown. Curated sequences of the hypervariable region of ribosomal ribonucleic acid (rRNA) obtained from a strain of Aeromonas hydrophila and two strains of Serratia proteamaculans after searches in the GenBank® database were analyzed. The analysis which included 104 other bacteria s...

In March 2014, an infection with the nematode Dirofilaria repens was diagnosed in a German citizen in the federal state of Saxony-Anhalt. The patient had developed an itching subcutaneous nodule containing a female worm, which was identified as D. repens by 12S ribosomal ribonucleic acid (rRNA) gene sequencing. Autochthonous human D. repens infections have not been described in Germany so far, ...

The genus Oxyrrhis is a heterotrophic dinoflagellate found in diverse marine environments. spp. have received attention owing to their ecological and industrial importance, high lipid contents, docosahexaenoic acid formation. To the best of our knowledge, contrary O. marina, ecophysiological characterization studies on maritima not yet been reported. Therefore, we investigated taxonomy ecophysi...

A light particle fraction of Saccharomyces cerevisiae, obtained from the crude ribosomal material, and containing the fatty acid synthetase, consisted primarily of 27S and 47S components. This fraction has a protein-ribonucleic acid ratio of about 13. Electron micrographs showed particles ranging in diameter between 100 and 300 A in this material. By use of density gradient analysis, the fatty ...

The genes for cytoplasmic ribosomal RNA are partially resolved from the bulk of the DNA by CsCl equilibrium centrifugation. Although in some plants the buoyant density of the ribosomal RNA genes is as expected from the base composition of ribosomal RNA, others show a large discrepancy which cannot be due to the presence of low G-C spacer-DNA. The cross-hybridization observed with 1.3 and 0.7 x ...

Ribosomes and immature ribonucleoprotein particles were isolated from extracts of log-phase cells grown under various conditions. Quantitative measurements were made to determine the relative amounts of immature particles present in the extracts. The results indicate that the steady-state level of ribosomal precursors accounted for essentially a constant fraction of the total ribonucleic acid (...