Results 21 to 30 of about 38,557 (248)

Electrochemical antioxidant screening and evaluation based on guanine and chitosan immobilized MoS2 nanosheet modified glassy carbon electrode (guanine/CS/MoS2/GCE)

Open Chemistry, 2020
In this study, an electrochemical biosensor based on guanine and chitosan immobilized MoS2 nanosheet modified glassy carbon electrode (guanine/CS/MoS2/GCE) was developed and employed for antioxidant screening and antioxidant capacity evaluation.
Tang Ping, Tang Xiaosheng, Mei Shiyong, Xie Yixi, Liu Liangliang, Ren Licheng   +5 more
doaj   +1 more source

Molecular dynamics simulation study of the binding of purine bases to the aptamer domain of the guanine sensing riboswitch [PDF]

, 2009
Riboswitches are a novel class of genetic control elements that function through the direct interaction of small metabolite molecules with structured RNA elements.
Stock, Gerhard, Wöhnert, Jens, Villa, Alessandra, Wohnert, J., Villa, A.   +4 more
core   +1 more source

Modulation of guanine deaminase [PDF]

Biochemical Journal, 1973
1. Guanine deaminases purified from the 15000g supernatant fraction of iso-osmotic sucrose homogenates of rat and mouse liver and brain were tested for the influence of GTP and allantoin. 2. The suffixes A and B were assigned to the isoenzyme fractions eluted from DEAE-cellulose with the lower and the higher molarity of eluent respectively. Isoenzyme A
K S, Kumar, A, Sitaramayya, P S, Krishnan   +2 more
openaire   +2 more sources

Electrochemical and theoretical evaluation of the interaction between dna and amodiaquine: evidence of the guanine adduct formation

Química Nova, 2010
The electrochemical behavior of the interaction of amodiaquine with DNA on a carbon paste electrode was studied using voltametric techniques. In an acid medium, an electroactive adduct is formed when amodiaquine interacts with DNA.
Maria Lara P. M. Arguelho, José do Patrocínio H. Alves, Nelson R. Stradiotto, Valdemar Lacerda Júnior, José Maria Pires, Adilson Beatriz   +5 more
doaj   +1 more source

Theoretical Assessment of the Ligand/Metal/Quadruplex Recognition in the Non-Canonical Nucleic Acids Structures

Molecules, 2023
Quadruplexes (GQs), peculiar DNA/RNA motifs concentrated in specific genomic regions, play a vital role in biological processes including telomere stability and, hence, represent promising targets for anticancer therapy. GQs are formed by folding guanine-
Nikoleta Kircheva, Stefan Dobrev, Vladislava Petkova, Snezhana Bakalova, Jose Kaneti, Silvia Angelova   +5 more
doaj   +1 more source

Dissecting the influence of Mg2+ on 3D architecture and ligand-binding of the guanine-sensing riboswitch aptamer domain [PDF]

, 2010
Long-range tertiary interactions determine the three-dimensional structure of a number of metabolite-binding riboswitch RNA elements and were found to be important for their regulatory function. For the guanine-sensing riboswitch of the Bacillus subtilis
Wöhnert, Jens, Buck, Janina, Schwalbe, Harald (Prof. Dr.), Noeske, Jonas   +3 more
core   +1 more source

Simultaneous Determination of Four DNA bases at Graphene Oxide/Multi-Walled Carbon Nanotube Nanocomposite-Modified Electrode

Micromachines, 2020
In this study, we developed a modified glassy carbon electrode (GCE) with graphene oxide, multi-walled carbon nanotube hybrid nanocomposite in chitosan (GCE/GO-MWCNT-CHT) to achieve simultaneous detection of four nucleobases (i.e., guanine (G), adenine ...
Shuting Wang, Celia Ferrag, Meissam Noroozifar, Kagan Kerman   +3 more
doaj   +1 more source

Influence of ground-state structure and Mg2+ binding on folding kinetics of the guanine-sensing riboswitch aptamer domain [PDF]

, 2011
Riboswitch RNAs fold into complex tertiary structures upon binding to their cognate ligand. Ligand recognition is accomplished by key residues in the binding pocket.
Julia Wirmer-Bartoschek, Anna Wacker, Wirmer-Bartoschek, J., Schwalbe, H., Wacker, A., Wirmer-Bartoschek, Julia, Eberhart Warkentin, Buck, Janina, Warkentin, E., Wacker, Anna, Wöhnert, Jens, Schwalbe, Harald, Harald Schwalbe, Wöhnert, J., Jens Wöhnert, Warkentin, Eberhart, Buck, J., Janina Buck, Wirmer-Bartoschek, Julia (author), Warkentin, Eberhart (author), Wöhnert, Jens (author), Wacker, Anna (author), Schwalbe, Harald (author), Buck, Janina (author)   +23 more
core   +1 more source

Infrared Spectral Signatures of Nucleobases in Interstellar Ices I: Purines

Life, 2023
The purine nucleobases adenine and guanine are complex organic molecules that are essential for life. Despite their ubiquitous presence on Earth, purines have yet to be detected in observations of astronomical environments.
Caroline Antunes Rosa, Alexandre Bergantini, Péter Herczku, Duncan V. Mifsud, Gergő Lakatos, Sándor T. S. Kovács, Béla Sulik, Zoltán Juhász, Sergio Ioppolo, Heidy M. Quitián-Lara, Nigel J. Mason, Claudia Lage   +11 more
doaj   +1 more source

Gas-Phase Studies of Hypoxanthine-Guanine-(Xanthine) Phosphoribosyltransferase (HG(X)PRT) Substrates

, 2023
The gas-phase acidity and proton affinity of nucleobases that are substrates for the enzyme Plasmodium falciparum hypoxanthine-guanine-(xanthine) phosphoribosyltransferase (Pf HG(X)PRT) have been examined using both computational and experimental methods.
Lanxin Zhang, Lanxin Zhang (11874204), G. S. M. Kiruba (2709949), Jeehiun K. Lee, Jeehiun K. Lee (1575025), G. S. M. Kiruba   +5 more
core   +1 more source