Concept
Xanthine
Publications associées (8)
Confinement-Controlled Crystallization of Guanine
Guanine crystals are frequently encountered in nature in the beta-polymorph to create structural colors, to enhance the vision of creatures, and for camouflage. Unfortunately, it is challenging to control the crystallization of guanine in aqueous condition ...
Amer Chemical Soc2024Array-based sensing of purine derivatives with fluorescent dyes
Natural and synthetic purine derivatives such as caffeine, theophylline, 6-mercaptopurine and 8-chlorotheophylline are important drugs. Due to the structural similarity of these compounds, it is intrinsically difficult to prepare chemosensors for their sel ...
Royal Soc Chemistry2015Novel Chemosensors for Biologically Important Analytes
In this work, fluorescent-based chemosensors for the detection of important analytes in aqueous solution are described. The sensors are based on different detection concepts, including analyte-induced aggregation/de-aggregation, pattern-based sensing and m ...
EPFL2015Polymorphs of Theophylline Characterized by DNP Enhanced Solid-State NMR
David Lyndon Emsley, Aaron James Rossini, Arthur César Pinon, David Benjamin Roger Antoine Gajan
We show how dynamic nuclear polarization (DNP) enhanced solid-state NMR spectroscopy can be used to characterize polymorphs and solvates of organic solids. We applied DNP to three polymorphs and one hydrated form of the asthma drug molecule theophylline. F ...
American Chemical Society2015Guanine derivatives as substrates for O6-alkylguanine-DNA alkyltransferase and their use in labeling the enzyme and fusion proteins
O6-substituted guanine derivs. are described for use as substrates for O6-alkylguanine-DNA alkyltransferases (AGT) that can be used to label the enzyme or fusion proteins contg. it. Proteins of interest are incorporated into an AGT fusion protein, the AGT ...
(Ecole Polytechnique Federale de Lausanne (EPFL), Switz.).2004Structure-activity relationships and inhibitory effects of various purine derivatives on the in vitro growth of Plasmodium falciparum
The development of novel chemotherapeutic agents has become an urgent task due to the development and rapid spread of drug resistance in Plasmodium falciparum, the protozoan parasite responsible for cerebral malaria. Cyclin-dependent kinases (CDKs) are ess ...
Elsevier2001Why pentose- and not hexose-nucleic acids? Part VII. Pyranosyl-RNA('p-RNA')
A review with 39 refs. Qual. conformational anal. of the entirety of conceivable hexo- and pentopyranosyl oligonucleotide systems derived from the diastereoisomeric aldohexoses (CH2O)6 and aldopentoses (CH2O)5 predicts the existence of a variety of pairing ...
1993Norepinephrine and histamine potentiate the increases in cyclic adenosine 3':5'-monophosphate elicited by vasoactive intestinal polypeptide in mouse cerebral cortical slices: mediation by alpha 1-adrenergic and H1-histaminergic receptors
We have examined the interactions, in eliciting cAMP accumulation, between vasoactive intestinal polypeptide (VIP) and the three monoamines norepinephrine (NE), histamine (HIS), and serotonin (5-hydroxytryptamine, 5-HT) in mouse cerebral cortical slices. W ...
1985