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5-METHYLURIDINE (RIBOSYLTHYMINE) Uridine Triphosphate (UTP): a nucleotide, the 5'-triphosphate of uridine; acting as a precursor in the synthesis of ribonucleic acid and of UDP-linked intermediates. Deoxyuridine Diphosphate (dUDP): a nucleotide, the 5'-phosphate of deoxyuridine; an intermediate in the synthesis of deoxythymidine triphosphate. Deoxyuridine Triphosphate (dUTP): a nucleotide, the 5'-triphosphate of deoxyuridine; an intermediate in the synthesis of deoxyribonucleotides. www.chemicalland21.com /lifescience/phar/5-METHYLURIDINE.htm   (1017 words)

Olympus Microscopy Resource Center: Polarized Light Microscopy Gallery - Uridine Uridine is one of four nucleosides used in genetic coding for RNA, and its complement is the nucleoside adenosine. Each molecule of uridine is comprised of 9 carbons, 12 hydrogens, 2 nitrogens, and 6 oxygen atoms, resulting in a molecular weight of 244.20. When certain uridine derivatives are, for instance, utilized with organ transplant procedures, the likelihood of organ rejection by the recipient is reduced due to immune system repression. www.olympusmicro.com /galleries/polarizedlight/pages/uridinesmall.html   (265 words)

Adenosine triphosphate - Wikipedia, the free encyclopedia Adenosine triphosphate (ATP) is the nucleotide known in biochemistry as the "molecular currency" of intracellular energy transfer; that is, ATP is able to store and transport chemical energy within cells. Living cells also have other "high-energy" nucleoside triphosphates, such as guanosine triphosphate. Between them and ATP, energy can be easily transferred with reactions such as those catalyzed by nucleoside diphosphokinase: Energy is released when hydrolysis of the phosphate-phosphate bonds is carried out. en.wikipedia.org /wiki/ATP   (424 words)

AllRefer.com - uracil (Biochemistry) - Encyclopedia When combined with the sugar ribose in a glycosidic linkage, uracil forms a derivative called uridine (a nucleoside), which in turn can be phosphorylated with from one to three phosphoric acid groups, yielding respectively the three nucleotides UMP (uridine monophosphate), UDP (uridine diphosphate), and UTP (uridine triphosphate). The analogous nucleosides and nucleotides formed from uridine and deoxyribose occur only very rarely in living systems; such is not the case with the other pyrimidines. The nucleotide derivatives of uracil perform important functions in cellular metabolism, particularly in carbohydrate metabolism; UTP acts as a coenzyme in the biosynthesis of sucrose in plants, lactose and glycogen in mammals, and chitin in insects. reference.allrefer.com /encyclopedia/U/uracil.html   (325 words)

Dorlands Medical Dictionary -pyrophosphate of uridine, which serves as a carrier for hexoses, hexosamines, and hexuronic acids in the synthesis of glycogen, glycoproteins, and glycosaminoglycans. -phosphate of uridine; it is a component of ribonucleic acid. -triphosphate of uridine; it is an activated precursor in the synthesis of ribonucleic acid and of UDP-linked hexoses involved in glycogen and glycoprotein metabolism. www.mercksource.com /pp/us/cns/cns_hl_dorlands.jspzQzpgzEzzSzppdocszSzuszSzcommonzSzdorlandszSzdorlandzSzdmd_u_04zPzhtm   (3992 words)

Cyclic adenosine monophosphate-dependent vascular responses to purinergic agonists adenosine triphosphate and uridine ...   (Site not responding. Last check: 2007-11-06) Cyclic adenosine monophosphate-dependent vascular responses to purinergic agonists adenosine triphosphate and uridine triphosphate in the anesthetized mouse. Cyclic adenosine monophosphate-dependent vascular responses to purinergic agonists adenosine triphosphate and uridine triphosphate in the anesthetized mouse.The mechanism by which purinergic agonist adenosine triphosphate (ATP) and uridine triphosphate (UTP) decrease systemic arterial pressure in the anesthetized mouse was investigated. Intravenous injections of adenosine triphosphate (ATP) and uridine triphosphate (UTP) produced dose-dependent decreases in systemic blood pressure in the mouse. www.pdg.cnb.uam.es /UniPub/iHOP/gp/9345361.html   (130 words)

Nucleotide - Wikipedia, the free encyclopedia Nucleotides also play important roles in cellular energy transport and transformations (notably ATP and NAD+/NADH), and in enzyme regulation (see for example, protein kinase). The nucleobase can be purines or pyrimidines, the sugar can be deoxyribose in DNA or ribose in RNA, and the phosphate chain can be a monophosphate, diphosphate, or triphosphate. A nucleotide that lacks the phosphate group is called nucleoside. en.wikipedia.org /wiki/Nucleotide   (200 words)

Patent 5,968,913 Novel pharmaceutical compositions of uridine 5'-triphosphate (UTP) for use in promoting increased mucociliary clearance of retained mucous secretions of the human airways, middle/inner ears or sinuses are disclosed. Novel Formulation I comprises UTP and aqueous solution having a therapeutic concentration between 5 and 45 mg/mL, a controlled tonicity within the range of 250 to 100 mOsM, a pH between 7.0 and 7.5, and is sterile. The compositions comprise a UTP raw material, e.g., uridine 5'-triphosphate trisodium salt dihydrate, in a sterile aqueous solution or suspension. www.pharmcast.com /Patents/101999OG/5968913_uridine101999.htm   (681 words)

Effects of substituting uridine triphosphate for ATP on the crossbridge cycle of rabbit muscle -- Seow et al. 537 (3): ... Effects of substituting uridine triphosphate for ATP on the crossbridge cycle of rabbit muscle -- Seow et al. Effects of substituting uridine triphosphate for ATP on the crossbridge cycle of rabbit muscle Substituting uridine triphosphate (UTP) for ATP as a substrate for rabbit skeletal myosin and actin at 4 °C slowed the dissociation of myosin-S1 from actin by threefold, and hydrolysis of the nucleotide by sevenfold, without a decrease in the rates of phosphate or uridine diphosphate dissociation from actomyosin. jp.physoc.org /cgi/content/abstract/537/3/907   (412 words)

Uracil - EvoWiki   (Site not responding. Last check: 2007-11-06) When uracil pairs with a ribose sugar it forms the nucleoside uridine. Uridine phosphate (UMP) - a constituent of RNA uridine diphosphate (UDP) and uridine triphosphate (UTP) - used as energy carriers in some matabolic reactions (similar to Adenosine triphosphate) wiki.cotch.net /wiki.phtml?title=Uracil   (144 words)

Tramadol, buy tramadol, antibiotics, Weight Loss drugs, weight loss herbs, weight loss herbal formula, weight loss, ... Despite half-lives in culture of about 3 h, adenosine triphosphate and uridine triphosphate in the presence of serum increased sulphated glycosaminoglycan and collagen deposition above control levels. In the presence of serum a single dose of uridine triphosphate on the first day of culture was sufficient to induce significant increases in subsequent proteoglycan and collagen deposition. We conclude that both adenine triphosphate and uridine triphosphate are anabolic for articular chondrocytes, and that this effect on the chondrocyte is long-term. www.hairmillion.com /ref-collagen/collagen-research-abs5.390.html   (1363 words)

Uridine triphosphate L'uridine triphosphate est un coenzyme de transfert de groupements phosphate qui est associé de façon non covalente c'est un (co-substrat) aux Les propriétés de l'uridine triphosphate et de ses dérivés, uridine diphosphate et uridine monophosphate, sont identiques à l'adénosine triphosphate (et ses dérivés). La structure de la uridine triphosphate est présentée figure 1. fr.efactory.pl /Uridine_triphosphate   (130 words)

Kinetic analysis of human deoxycytidine kinase with the true phosphate donor uridine triphosphate. Kinetic analysis of human deoxycytidine kinase with the true phosphate donor uridine triphosphate. Previous studies have focused on deoxycytidine (dCyd) and adenosine triphosphate (ATP) as substrates for this enzyme. In view of recent data indicating that uridine triphosphate (UTP) is the physiologic phosphate donor for this enzyme, a study of the kinetic properties of dCyd kinase with dCyd and UTP was undertaken. www.pdg.cnb.uam.es /UniPub/iHOP/gp/1054040.html   (378 words)

Mechanisms of coronary artery depolarization by uridine triphosphate -- Welsh and Brayden 280 (6): 2545 -- AJP - Heart ... Pyrimidine nucleotides depolarize and constrict isolated coronary arteries. A: uridine triphosphate (UTP; n = 6; EC = 3.2 µM) and uridine diphosphate (UDP; n = 3; EC = 8.5 µM) induce dose-dependent constriction of intact coronary resistance arteries. Mobilization of intracellular calcium in cultured vascular smooth muscle cells by uridine triphosphate and the calcium ionophore A23187. ajpheart.physiology.org /cgi/content/full/280/6/H2545   (4451 words)

Functional P2Y2 Nucleotide Receptors Mediate Uridine 5'-Triphosphate-Induced Intimal Hyperplasia in Collared Rabbit ... Nucleotide Receptors Mediate Uridine 5'-Triphosphate–Induced Intimal Hyperplasia in Collared Rabbit Carotid Arteries Source and concentration of extracellular adenosine triphosphate during haemostasis in rats, rabbits and man. J Physiol (Lond). Uridine nucleotide selectivity of three phospholipase C-activating P2 receptors: identification of a UDP-selective, and a UTP-specific receptor. circ.ahajournals.org /cgi/content/full/106/21/2720   (3383 words)

Thymidine Reversal of Ribothymidine Inhibition of Lymphocyte Mitosis. In addition, in cell-free systems, ribothymidine triphosphate is incorporated into RNA in place of uridine triphosphate by either DNA-dependent RNA polymerase (6) or RNA-dependent RNA polymerase (7), whereas thymidine triphosphate is not utilized (8). In cell-free systems, ribothymidine triphosphate is incorporated into new RNA in place of uridine triphosphate by both DNA-dependent RNA polymerase (6) and by RNA-dependent RNA polymerase (7). Ribothymidine triphosphate may compete directly with deoxythymidine triphosphate on the DNA template and, and inhibit DNA polymerase (17). www.euchromatin.net /RiboT01.htm   (1602 words)

Modulation of rat tissue galactose-1-phosphate uridyltransferase by uridine and uridine triphosphate -- Rogers and ...   (Site not responding. Last check: 2007-11-06) Modulation of rat tissue galactose-1-phosphate uridyltransferase by uridine and uridine triphosphate -- Rogers and Segal 30 (3): 222 -- Pediatric Research Modulation of rat tissue galactose-1-phosphate uridyltransferase by uridine and uridine triphosphate uridine administration is known to increase hepatic UTP concentration. www.pedresearch.org /cgi/content/abstract/30/3/222   (285 words)

Effect of Aerosolized Uridine 5'-Triphosphate on Mucociliary Clearance in Mild Chronic Bronchitis -- BENNETT et al. 164 ... Effect of Aerosolized Uridine 5'-Triphosphate on Mucociliary Clearance in Mild Chronic Bronchitis -- BENNETT et al. Effect of Aerosolized Uridine 5'-Triphosphate on Mucociliary Clearance in Mild Chronic Bronchitis Acute safety and effects on mucociliary clearance of aerosolized uridine 5'-triphosphate ± amiloride in normal human adults. ajrccm.atsjournals.org /cgi/content/full/164/2/302   (4000 words)

British Journal of Pharmacology - Abstract of article: The stable pyrimidines UDP The contractile and relaxant effects of the different P2 receptors were characterized in the rat isolated mesenteric artery by use of extracellular nucleotides, including the stable pyrimidines uridine 5'-O-thiodiphosphate (UDP The contractile concentration-response curve of adenosine triphosphate (ATP) was biphasic when added in single concentrations. Uridine diphosphate (UDP), uridine triphosphate (UTP) and ATP stimulated contraction only in high concentrations (1−10 mM). www.nature.com /bjp/journal/v131/n1/abs/0703536a.html   (345 words)

Sodium channel blockers and uridine triphosphate: effects on nasal potential difference in cystic fibrosis mice -- ... Sodium channel blockers and uridine triphosphate: effects on nasal potential difference in cystic fibrosis mice A combination of these effects may produce less viscid secretions in CF which are easier to expectorate. This study examined the effects of combining sodium channel blockers with uridine triphosphate (UTP) on nasal membrane potential difference (PD) in CF insertional null mutant mice (cftr(tm1HGU)), deltaF508 homozygous mice (cftr(tm1Cam)) and matched control animals. erj.ersjournals.com /cgi/content/abstract/15/1/146   (310 words)

Mechanisms of coronary artery depolarization by uridine triphosphate -- Welsh and Brayden 280 (6): 2545 -- AJP - Heart ... Mechanisms of coronary artery depolarization by uridine triphosphate -- Welsh and Brayden 280 (6): 2545 -- AJP - Heart and Circulatory Physiology Mechanisms of coronary artery depolarization by uridine triphosphate We sought to define the basic mechanisms by which pyrimidine nucleotides constrict rat coronary resistance arteries. ajpheart.physiology.org /cgi/content/abstract/280/6/H2545   (277 words)

Tripart Paste   (Site not responding. Last check: 2007-11-06) ATP (Adenosine Triphosphate) is the chemical which is converted in muscles to release energy. UTP (Uridine Triphosphate) is of value in the treatment of muscular atrophy and muscle weakness. Potassium and Magnesium aspartate improve endurance - aspartate decreases blood lactate and ammonia, thus fatigue is delayed. www.greyhoundproducts.com /english/TripartPaste.htm   (301 words)

Search Results for uridine triphosphate - Encyclopædia Britannica The formation of polysaccharides and of phospholipids from their component building blocks not only requires the investment of the energy of nucleoside triphosphates but uses these molecules in a... It is the ribonucleotide of hypoxanthine and is the first compound formed during the synthesis of purine in organisms. Autobiography of this British scientist awarded the Nobel Prize in Chemistry in 1997, for research on adenosine triphosphate (ATP). www.britannica.com /search?query=uridine+triphosphate   (401 words)

World Intellectual Property Organization   (Site not responding. Last check: 2007-11-06) The method according to Claim 6, wherein said dinucleoside polyphosphates of general Formula I are dinucleoside triphosphates selected from a group consisting of deoxyadenosine 5'-)P3-(6-thiohexylpurine riboside 5'-) tetraphosphate; and P1-(6- eicosanyloxypurine riboside 5'-) P3-(uridine 5'-) triphosphate. (uridine 5'-)-P4-(thymidine 5'-) tetraphosphate ; P1-(adenosine 5')-p4-(insoline 5'-) tetraphosphate; www.wipo.int /ipdl/IPDL-CIMAGES/view/pct/getbykey5?KEY=02/60454.030213&ELEMENT_SET=DECL   (1483 words)

Effects of Methacholine and Uridine 5'-Triphosphate on Tracheal Mucus Rheology in Mice -- Sudo et al. 22 (3): 373 -- ... Abbreviations: adenosine triphosphate, ATP; cyclic adenosine monophosphate, cAMP; cystic fibrosis, CF; cystic fibrosis transmembrane Effect of ATP and UTP on fluid transport by human nasal epithelial cells in culture. Acute effects of uridine 5'-triphosphate on mucociliary clearance in isolated frog palate. ajrcmb.atsjournals.org /cgi/content/full/22/3/373   (3679 words)

Online Pharmacy, Tramadol, Paxil, antibiotics, amoxicillin, zithromax, Rx Online, pharmaceuticals, DHEA, prescription ... Mechanisms of secretion of ATP from cortical astrocytes triggered by uridine triphosphate. Astrocytes released ATP in response to application of 10 microM uridine triphosphate, which was blocked by the non-specific purinergic receptor antagonist suramin. These results suggest that calcium-dependent exocytosis and transportation via anion transporters are the predominant secretion mechanisms for uridine triphosphate-stimulated ATP release from cortical astrocytes. www.hairmillion.com /rx-online-info/furosemide-online-rx/furosemide-online-rx.1417.html   (669 words)

Effects of substituting uridine triphosphate for ATP on the crossbridge cycle of rabbit muscle -- Seow et al. 537 (3): ... One way to investigate this sequence is to perturb specific transitions and assess both the mechanical and biochemical responses. In the present study, we have substituted uridine triphosphate (UTP) for ATP and compared the changes in the chemical reaction rates, which were measured with isolated myosin subfragment-1 (S1) and actin, to the changes in the contractile characteristics of skinned muscle fibres. The reactions studied in the biochemical studies of isolated protein kinetics are numbered to facilitate description of those experiments. jp.physoc.org /cgi/content/full/537/3/907   (9563 words)

Articles - Uridine 5'-triphosphate   (Site not responding. Last check: 2007-11-06) Look for Uridine 5'-triphosphate in Wiktionary, our sister dictionary project. Look for Uridine 5'-triphosphate in the Commons, our repository for free images, music, sound, and video. If you have created this page in the past few minutes and it has not yet appeared, it may not be visible due to a delay in updating the database. www.aomatic.com /articles/Uridine_5%27-triphosphate   (129 words)

Sir Alexander Robertus Todd   (Site not responding. Last check: 2007-11-06) While at Manchester he began work on nucleosides, compounds that form the structural units of nucleic acids (DNA and RNA). In 1949 he synthesized a related substance, adenosine triphosphate (ATP), which is vital to energy utilization in living organisms. He synthesized two other important compounds, flavin adenine dinucleotide (FAD) in 1949 and uridine triphosphate in 1954. www.nobel-winners.com /Chemistry/sir_alexander_robertus_todd.html   (231 words)

uridylic acid from On-line Medical Dictionary   (Site not responding. Last check: 2007-11-06) Uridine esterified by phosphoric acid on one or more sugar hydroxyl groups; UMP is typically uridine 5'-monophosphate; 2' and 3' derivatives also occur; precursor for the biosynthesis of other pyrimidine nucleotides. Uridylic acid synthase, a bifunctional enzyme that contains the activities of both orotate phosphoribosyltransferase and orotidine-5'-monophosphate decarboxylase; catalyses a key step in pyrimidine biosynthesis; a deficiency of this enzyme leads to orotic aciduria. Previous: uridine triphosphatase, uridine triphosphate, uridrosis, uridrosis crystallina cancerweb.ncl.ac.uk /cgi-bin/omd?uridine+5'-monophosphate   (84 words)

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