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Sida 1 från 49 resultat
A supramolecular Cu(II) metallocyclophane probe for guanosine 5'-monophosphate.
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We demonstrate Cu(2+) ion induced formation of a novel water soluble metallocyclophane [.CuCl(2)](2), which uniquely recognizes guanosine 5'-monophosphate through changes in emission intensity utilizing synergistic effects of electrostatic, coordinative and pi-stacking interactions inside the
Enhanced solubility of guanosine by inclusion complexes with cyclodextrin derivatives: Preparation, characterization, and evaluation.
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This study improves the water solubility and cellular uptake of guanosine (GuN) through an inclusion complexation with cyclodextrin derivatives (CDs), namely β-cyclodextrin (β-CD), hydroxypropyl-β-cyclodextrin (HP-β-CD), and sulfobutyl ether-β-cyclodextrin (SBE-β-CD). Inclusion complexes of GuN and
Tissue guanosine-3',5'-cyclic monophosphate levels and soluble guanylate cyclase activity: a positive correlation during unilateral cryptorchidism in the rat testis.
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The relationship between the subcellular distribution of guanylate cyclase and tissue guanosine-3',5'-cyclic monophosphate (cGMP) levels was investigated in rat testes after surgically induced unilateral cryptorchidism. Placement of one of a testis pair in the abdominal cavity results in loss of
Quantum dot nanocrystals having guanosine imprinted nanoshell for DNA recognition.
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Molecular imprinted polymers (MIPs) as a recognition element for sensors are increasingly of interest and MIP nanoparticles have started to appear in the literature. In this study, we have proposed a novel thiol ligand-capping method with polymerizable methacryloylamido-cysteine (MAC) attached to
Selective binding of monovalent cations to the stacking G-quartet structure formed by guanosine 5'-monophosphate: a solid-state NMR study.
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We report a solid-state multinuclear ((23)Na, (15)N, (13)C, and (31)P) NMR study on the relative affinity of monovalent cations for a stacking G-quartet structure formed by guanosine 5'-monophosphate (5'-GMP) self-association at pH 8. Two major types of cations are bound to the 5'-GMP structure: one
Locating counterions in guanosine quadruplexes: a contrast-variation neutron diffraction experiment in condensed hexagonal phase.
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Guanosine, one of the primary components of nucleic acids, self-associates in water to form G-quadruplexes, four-stranded helicoidal aggregates, made by stacked planar tetramers, consisting of four planar guanine molecules. Essential for the stability of these supramolecular aggregates is the
The Rac2 guanosine triphosphatase regulates B lymphocyte antigen receptor responses and chemotaxis and is required for establishment of B-1a and marginal zone B lymphocytes.
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We have defined roles for the hemopoietic-specific Rho guanosine triphosphatase, Rac2, in B lymphocyte development and function through examination of rac2(-/-) mice. Rac2-deficient mice displayed peripheral blood B lymphocytosis and marked reductions in peritoneal cavity B-1a lymphocytes, marginal
Role of p38 MAPK pathway in induction of iNOS expression in neutrophils and peripheral blood mononuclear cells in patients with squamous cell carcinoma of the oral cavity.
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OBJECTIVE
The aim of the present study was to assess the role of the p38 mitogen-activated protein kinase (MAPK) pathway in the induction of inducible nitric oxide synthase (iNOS) expression and the production of NO by neutrophils (polymorphonuclear neutrophils [PMNs]) and peripheral blood
Presence of endogenous cross-linking/bifunctional agents in gastrointestinal cavity as detected by transit of magnetic PEI microcapsules.
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After gastrointestinal (GI) transit through rats, semipermeable bifunctional microcapsules containing polyethyleneimine (PEI) as a DNA-stimulating nucleophilic target showed physiochemical alterations consistent with PEI amine functions being intermolecularly cross-linked as by bifunctional agents.
Involvement of phosphoenolpyruvate in the catabolism of caries-conducive disaccharides by Streptococcus mutans: lactose transport.
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The mechanisms for transport and hydrolysis of lactose were investigated in five cariogenic strains (HS6, AHT, FA1, NCTC 10449, and SL1) representing the four serogenetic groups of Streptococcus mutans. The systems for transport and hydrolysis of lactose had the characteristics of a
Effect of perindopril in rat cardiac volume overload.
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The aortocaval fistula is a classic model of pure cardiac volume overload in rats. This model is characterized by dilation of the ventricular cavities and eccentric cardiac hypertrophy. There are also changes in peripheral arterial flow: high flow in the proximal part of the aorta, upstream of the
The cyclic nucleotide-gated ion channel CNGA3 contributes to coolness-induced responses of Grueneberg ganglion neurons.
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Localized to the vestibule of the nasal cavity, neurons of the Grueneberg ganglion (GG) respond to cool ambient temperatures. The molecular mechanisms underlying this thermal response are still elusive. Recently, it has been suggested that cool temperatures may activate a cyclic guanosine
Structure of Rab GDP-dissociation inhibitor in complex with prenylated YPT1 GTPase.
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Rab/Ypt guanosine triphosphatases (GTPases) represent a family of key membrane traffic regulators in eukaryotic cells whose function is governed by the guanosine diphosphate (GDP) dissociation inhibitor (RabGDI). Using a combination of chemical synthesis and protein engineering, we generated and
cGAMP Promotes Germinal Center Formation and Production of IgA in Nasal-Associated Lymphoid Tissue.
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Induction of immunoglobulin (Ig) A in the mucosa of the upper respiratory tract and the nasal cavity protects against influenza virus infection. Cyclic dinucleotides (CDNs) are used as mucosal adjuvants to enhance the immunogenicity of intranasal influenza hemagglutinin (HA) vaccines. The adjuvant
Molecularly imprinted polymer as efficient sorbent of solid-phase extraction for determination of gonyautoxin 1,4 in seawater followed by high-performance liquid chromatography-fluorescence detection.
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A kind of new molecularly imprinted polymer (MIP) was synthesized by bulk polymerization using guanosine as dummy template molecule, α-methacrylic acid as functional monomer and ethylene glycol dimethyl acrylic ester as crosslinker. Fourier transform infrared spectroscopy (FT-IR) and scanning
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