Results 61 to 70 of about 194,604 (252)

Photoactivation of trans diamine platinum complexes in aqueous solution and effect on reactivity towards nucleotides [PDF]

open access: yes, 2010
We show that UVA irradiation (365 nm) of the Pt-IV complex trans,trans,trans-[(PtCl2)-Cl-IV(OH)(2)(dimethylamine) (isopropylamine)] (1), induces reduction to Pt-II photoproducts.
Cubo, Leticia   +5 more
core   +1 more source

Synthesis of microporous hydrogen-bonded supramolecular organic frameworks through guanosine self-assembly

open access: yesCell Reports Physical Science, 2021
Summary: Extending the structural hierarchy and complexity through small-molecular self-assembly is a powerful way to obtain large discrete, functional molecular architecture.
Ying He   +8 more
doaj  

Revisiting the microtubule based quantum models of mind: tubulin bound GTP cannot pump microtubule coherence or provide energy for alpha <-> beta computation in stable microtubules [PDF]

open access: yes, 2003
The current paper investigates the biological models of stable brain microtubules as quantum or classical computers whose function is based on electron hopping associated with kinking of the tubulin dimer. Hameroff (1998a, 1998b, 2003a, 2003b), Tuszynski
Georgiev, Danko
core  

Metabolic engineering of the purine biosynthetic pathway in Corynebacterium glutamicum results in increased intracellular pool sizes of IMP and hypoxanthine [PDF]

open access: yes, 2012
Background: Purine nucleotides exhibit various functions in cellular metabolism. Besides serving as building blocks for nucleic acid synthesis, they participate in signaling pathways and energy metabolism.
Barduhn, Tobias   +5 more
core   +1 more source

G-Quadruplex Guanosine Gels and Single Walled Carbon Nanotubes

open access: yesMolecules, 2013
Solubilization of single walled carbon nanotubes (SWNTs) in aqueous gel phases formed by reversible, G-quadruplex self-assembly of guanosine monophosphate (GMP) alone or with guanosine (Guo) is described.
Yuehua Yu   +3 more
doaj   +1 more source

Modeling oscillatory Microtubule--Polymerization [PDF]

open access: yes, 2002
Polymerization of microtubules is ubiquitous in biological cells and under certain conditions it becomes oscillatory in time. Here simple reaction models are analyzed that capture such oscillations as well as the length distribution of microtubules.
arxiv   +1 more source

Gastroprotective effects of oral nucleotide administration [PDF]

open access: yes, 2006
BACKGROUND AND AIMS: Nucleotides form the building blocks of DNA and are marketed as dietary supplements, alone or in combination with other ingredients, to promote general health.
Belo, A   +4 more
core   +2 more sources

Stability analysis of a signaling circuit with dual species of GTPase switches [PDF]

open access: yesarXiv, 2020
GTPases are molecular switches that regulate a wide range of cellular processes, such as organelle biogenesis, position, shape, and signal transduction. These enzymes operate by toggling between an active ("ON") guanosine triphosphate (GTP)-bound state and an inactive ("OFF") guanosine diphosphate (GDP)-bound state; such a toggle is regulated by GEFs ...
arxiv  

Shear-Induced Nitric Oxide Production by Endothelial Cells [PDF]

open access: yes, 2016
We present a biochemical model of the wall shear stress (WSS)-induced activation of endothelial nitric oxide synthase (eNOS) in an endothelial cell (EC). The model includes three key mechanotransducers: mechanosensing ion channels, integrins and G-protein-coupled receptors. The reaction cascade consists of two interconnected parts.
arxiv   +1 more source

Charge Transfer-oxy Radical Mechanism for Anti-cancer Agents [PDF]

open access: yes, 1986
The proposal is advanced that anti-cancer drugs generally function by charge transfer resulting in formation of toxic oxy radicals which destroy the neoplasm.
Ames, James R.   +5 more
core   +1 more source

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