Results 41 to 50 of about 193,772 (411)
Chemical and Conformational Diversity of Modified Nucleosides Affects tRNA Structure and Function
Biomolecules, 2017 RNAs are central to all gene expression through the control of protein synthesis. Four major nucleosides, adenosine, guanosine, cytidine and uridine, compose RNAs and provide sequence variation, but are limited in contributions to structural variation as
Ville Y. P. Väre +4 more
semanticscholar +1 more source
Tissue distribution of 5-hydroxymethylcytosine and search for active demethylation intermediates. [PDF]
, 2010 5-Hydroxymethylcytosine (hmC) was recently detected as the sixth base in mammalian tissue at so far controversial levels. The function of the modified base is currently unknown, but it is certain that the base is generated from 5-methylcytosine (mC ...
Biel, Martin +8 more
core +9 more sources
A composite model for DNA torsion dynamics [PDF]
Phys. Rev. E75 (2007), 021919, 2006 DNA torsion dynamics is essential in the transcription process; a simple model for it, in reasonable agreement with experimental observations, has been proposed by Yakushevich (Y) and developed by several authors; in this, the DNA subunits made of a nucleoside and the attached nitrogen bases are described by a single degree of freedom. In this paper we
arxiv +1 more source
Nucleotides: Structure and Properties [PDF]
, 2005 Nucleotides consist of a nitrogen-containing base, a five-carbon sugar, and one or more phosphate groups. Cells contain many types of nucleotides, which play a central role in a wide variety of cellular processes, including metabolic regulation and the ...
Bowater, RP
core +1 more source
Pd0-Catalyzed Methyl Transfer on Nucleosides and Oligonucleotides, Envisaged as a PET Tracer
Molecules, 2013 The methyl transfer reaction from activated monomethyltin, via a modified Stille coupling reaction, was studied under “ligandless” conditions on fully deprotected 5'-modified nucleosides and one dinucleotide. The reaction was optimized to proceed in
Eric Fouquet +3 more
doaj +1 more source
Moving breathers in bent DNA with realistic parameters [PDF]
Mod. Phys. Lett. B. 18(25):1319-1326, 2004, 2004 Recent papers have considered moving breathers (MBs) in DNA models including long range interaction due to the dipole moments of the hydrogen bonds. We have recalculated the value of the charge transfer when hydrogen bonds stretch using quantum chemical methods which takes into account the whole nucleoside pairs.
arxiv +1 more source
Human immunodeficiency virus rebound after suppression to < 400 copies/mL during initial highly active antiretroviral therapy regimens, according to prior nucleoside experience and duration of suppression [PDF]
, 2002 This study evaluated 1433 human immunodeficiency virus (HIV)-infected patients starting highly active antiretroviral therapy (HAART), 409 (28%) of whom had prior nucleoside experience and achieved an HIV load of
Bickel, M +11 more
core +1 more source
eLife, 2014 Concentrative nucleoside transporters (CNTs) are responsible for cellular entry of nucleosides, which serve as precursors to nucleic acids and act as signaling molecules. CNTs also play a crucial role in the uptake of nucleoside-derived drugs, including anticancer and antiviral agents.
Minhee Lee +6 more
openaire +4 more sources
The Prevailing Catalytic Role of Meteorites in Formamide Prebiotic Processes
Life, 2018 Meteorites are consensually considered to be involved in the origin of life on this Planet for several functions and at different levels: (i) as providers of impact energy during their passage through the atmosphere; (ii) as agents of geodynamics ...
Raffaele Saladino +2 more
doaj +1 more source
Mesoscopic modeling for nucleic acid chain dynamics [PDF]
Phys. Rev. E, 71 art. num. 051902 (2005), 2005 To gain a deeper insight into cellular processes such as transcription and translation, one needs to uncover the mechanisms controlling the configurational changes of nucleic acids. As a step toward this aim, we present here a novel mesoscopic-level computational model that provides a new window into nucleic acid dynamics.
arxiv +1 more source