Photoluminescence quenching of [Ru(bpy)2(atatp)]2+ bound to a condensed DNA matrix

Certain double stranded DNA bacteriophage and viruses are thought to have their DNA organized into large torus shaped structures. Morphologically, these poorly understood biological DNA tertiary structures resemble spermidine-condensed DNA complexes formed in vitro in the total absence of other macromolecules normally synthesized by the pathogens for the purpose of their own DNA packaging. Therefore, we have studied the tertiary structure of these self-assembling torus shaped spermidine- DNA complexes in a series of reports. Using freeze-etch, low Pt-C metal (10-15Å) replicas, we have visualized the microscopic DNA organization of both calf Thymus( CT) and linear 0X-174 RFII DNA toruses. In these structures DNA is circumferentially wound, continuously, around the torus into a semi-crystalline, hexagonal packed array of parallel DNA helix sections.

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Photoluminescence Quenching Goes Digital – View on Defect Dynamics Beyond Ensemble Averaging

10.29363/nanoge.nipho.2020.116 ◽

2019 ◽

Author(s):

Ivan Scheblykin

Keyword(s):

Ensemble Averaging ◽

Photoluminescence Quenching

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Heavily Eu2O3-doped yttria-aluminoborate glasses for red photoconversion with a high quantum yield: luminescence quenching and statistics of cluster formation

Journal of Materials Chemistry C ◽

10.1039/c4tc01447b ◽

2014 ◽

Vol 2 (41) ◽

pp. 8678-8682 ◽

Cited By ~ 53

Author(s):

Guojun Gao ◽

Jingxue Wei ◽

Yang Shen ◽

Mingying Peng ◽

Lothar Wondraczek

Keyword(s):

Quantum Yield ◽

Doping Concentration ◽

Statistical Approach ◽

Cluster Formation ◽

Luminescence Quenching ◽

High Quantum Yield ◽

Photoluminescence Quenching ◽

High Quantum

We employ a statistical approach to estimate the number of photoluminescence quenching species as a function of doping concentration.

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Induction of DNA replication in germinal vesicles and in nuclei formed in maturing mouse oocytes by 6-DMAP treatment

Zygote ◽

10.1017/s0967199400003646 ◽

1997 ◽

Vol 5 (3) ◽

pp. 213-217 ◽

Cited By ~ 3

Author(s):

J. Fulka ◽

N.L. First ◽

C. Lee ◽

J. Fulka ◽

R.M. Moor

Keyword(s):

Dna Replication ◽

Dna Synthesis ◽

Germinal Vesicle ◽

The Other ◽

Immature Oocytes ◽

Mouse Oocytes ◽

Germinal Vesicles ◽

Immature Mouse ◽

Condensed Dna ◽

Metaphase Ii Oocytes

SummaryImmature mouse oocytes (germinal vesicle stage, GV), oocytes at different stages during maturation (prometaphase to anaphase I) and matured oocytes (metaphase II arrested) were cultured in 6-dimethylaminopurine (6-DMAP)-supplemented medium also containing bromodeoxyuridine for the assessment of DNA replication in these cells. Immature oocytes remained arrested at the GV stage and DNA replication was never detected in them. On the other hand, oocytes at the prometaphase to anaphase-telophase I stages responded to 6-DMAP treatment by forming nuclei which synthesised DNA. Mature (metaphase II) oocytes did not respond to 6-DMAP and their chromatin remained condensed. DNA synthesis could even be induced in GV-staged oocytes, but only when they were fused to freshly activated oocytes and incubated in 6-DMAP-supplemented medium.

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