PMID: 1201686Nov 24, 1975Paper

Independent replication of the ribosomal RNA genes in the polytrophic-meroistic ovaries of Calliphora erythrocephala, Drosophila hydei, and Sarcophaga barbata

Chromosoma
R Renkawitz, W Kunz

Abstract

By filter saturation hybridizations the ribosomal (r)DNA contents of the ovaries Calliphora erythrocephala, Drosophila hydei, and Sarcophaga barbata have been measured in comparison to the rDNA percentages of their diploid brains. The measurements of the ovarian rDNA have been carried out on ovaries where the nurse cells in the distal egg chamber of the ovarioles had reached their highest ploidy level. The diploid rDNA content of each of the respective species was chosen as a 100% standard and the rDNA amounts of the ovaries were related to this 100% level. The results show that the ovaries of C. erythrocephala contain 135% rDNA whereas the rDNA contents in the ovaries of D. hydei and S. barbata are only 51% and 47%, respectively. Measurements carried out on isolated nuclei of the nurse cells and follicle cells in D. hydei show that both have a reduced rDNA content in comparison to the brains (45% and 70%, respectively). The data are discussed in relation to the problem of an rDNA amplification in the germ cells and an rDNA underreplication in polyploid nuclei.

References

Jan 20, 1975·Biochimica Et Biophysica Acta·R G HerrmannJ M Schmitt
May 1, 1973·Proceedings of the National Academy of Sciences of the United States of America·B B Spear, J G Gall
Jan 1, 1974·Molecular & General Genetics : MGG·M Marrakechi
Jul 1, 1974·The Journal of Cell Biology·A G Gambarini, F J Lara
Mar 18, 1969·Biochimica Et Biophysica Acta·C F Brunk, V Leick
Jul 1, 1965·Journal of Molecular Biology·D Gillespie, S Spiegelman
Aug 1, 1972·The Journal of Cell Biology·A G Gambarini, R Meneghini
Feb 1, 1972·Analytical Biochemistry·K Lanclos, E Bresnick
Jun 1, 1968·Proceedings of the National Academy of Sciences of the United States of America·J G Gall
Mar 31, 1970·Biochemistry·G CorneoE Polli
Jan 1, 1970·Zeitschrift für Zellforschung und mikroskopische Anatomie·C C Dapples, R C King
Aug 1, 1968·The Journal of Cell Biology·J B BoydH Boyd
Aug 23, 1968·Biochimica Et Biophysica Acta·D Evans, M L Birnstiel
Jan 1, 1969·Chromosoma·J G GallM E Kidston
Feb 1, 1965·Journal of Molecular Biology·F W STUDIER
Jun 1, 1973·Wilhelm Roux' Archiv Für Entwicklungsmechanik Der Organismen·Franz DuspivaHermelita Winter

❮ Previous
Next ❯

Citations

Jan 1, 1980·Molecular & General Genetics : MGG·C Grimm, W Kunz
May 23, 1979·Molecular & General Genetics : MGG·R RenkawitzK H Glätzer
Jan 1, 1981·Chromosoma·R M Sinibaldi, M R Cummings
Aug 1, 1985·Proceedings of the National Academy of Sciences of the United States of America·E J Belikoff, K Beckingham
Oct 24, 1980·Nucleic Acids Research·R Renkawitz-PohlW Kunz
Aug 1, 1976·Experimental Cell Research·M D Cave, J Sixbey

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.