Results 31 to 40 of about 165,169 (375)
Ultrafast Photo-Ion Probing of the Relaxation Dynamics in 2-Thiouracil
Molecules, 2023 In this work, we investigate the relaxation processes of 2-thiouracil after UV photoexcitation to the S2 state through the use of ultrafast, single-colour, pump-probe UV/UV spectroscopy. We place focus on investigating the appearance and subsequent decay
Matthew Scott Robinson +2 more
doaj +1 more source
Threshold behavior in metastable dissociation of multi-photon ionized thymine and uracil [PDF]
, 2017 Microsecond-timescale HNCO loss has been observed from single-color multi-photon ionized pyrimidine nucleobases in the gas phase. Photon energy thresholds for the metastable channels have been measured at 5.55 ± 0.02 eV for thymine and 5.57 ± 0.02 eV for
da Fonseca Cunha, T. +8 more
core +3 more sources
Proceedings of the National Academy of Sciences of the United States of America, 1997 Folate deficiency causes massive incorporation of uracil into human DNA (4 million per cell) and chromosome breaks. The likely mechanism is the deficient methylation of dUMP to dTMP and subsequent incorporation of uracil into DNA by DNA polymerase ...
Benjamin C. Blount +8 more
semanticscholar +1 more source
Nature Communications, 2019 The efficacy of Fluorouracil (FU) in the treatment of colorectal cancer (CRC) is greatly limited by drug resistance. Autophagy has been implicated in chemoresistance, but the role of selective autophagic degradation in regulating chemoresistance remains ...
Juanjuan Ou +17 more
semanticscholar +1 more source
Adsorption of Nucleic Acid Bases, Ribose, and Phosphate by Some Clay Minerals
Life, 2015 Besides having a large capacity for taking up organic molecules, clay minerals can catalyze a variety of organic reactions. Derived from rock weathering, clay minerals would have been abundant in the early Earth. As such, they might be expected to play a
Hideo Hashizume
doaj +1 more source
Structure of isolated biomolecules by electron diffraction-laser desorption: uracil and guanine [PDF]
, 2009 We report the structure of isolated biomolecules, uracil and guanine, demonstrating the capability of a newly developed electron diffraction apparatus augmented with surface-assisted IR laser desorption.
Gahlmann, Andreas +2 more
core +1 more source
Functional and genetic evidence that nucleoside transport is highly conserved in Leishmania species: Implications for pyrimidine-based chemotherapy [PDF]
, 2017 Leishmania pyrimidine salvage is replete with opportunities for therapeutic intervention with enzyme inhibitors or antimetabolites. Their uptake into cells depends upon specific transporters; therefore it is essential to establish whether various ...
Ali, Juma A.M. +7 more
core +2 more sources
Surface-Enhanced Hyper-Raman Spectra of Adenine, Guanine, Cytosine, Thymine, and Uracil
The journal of physical chemistry. C, Nanomaterials and interfaces, 2016 Using picosecond excitation at 1064 nm, surface-enhanced hyper-Raman scattering (SEHRS) spectra of the nucleobases adenine, guanine, cytosine, thymine, and uracil with two different types of silver nanoparticles were obtained. Comparing the SEHRS spectra
F. Madzharova +3 more
semanticscholar +1 more source
Cytosine-to-Uracil Deamination by SssI DNA Methyltransferase [PDF]
, 2013 The prokaryotic DNA(cytosine-5)methyltransferase M.SssI shares the specificity of eukaryotic DNA methyltransferases (CG) and is an important model and experimental tool in the study of eukaryotic DNA methylation.
A Beletskii +47 more
core +7 more sources
Beilstein Journal of Organic Chemistry, 2015 An intramolecular dehydrogenative C–H activation enabled an efficient synthesis of an uracil-annulated β-carbolinone ring system. The reaction is simple, efficient and high yielding (85–92%).
Biplab Mondal +3 more
doaj +1 more source